
My sister-in-law tried to steal my husband after discovering she was adopted, but her parents disowned her for looking at her brother. Edit: To clarify, my sister-in-law is my husband’s adopted sister. She was taken into the family as a child. They grew up as siblings, but a few years ago she found out she was adopted.
That revelation seemed to change her perspective, and she developed an inappropriate crush on my husband, which became obsessive during her stay with us. I, 32, have been married to my husband of 34 years for five years and together for eight. My sister-in-law is 30 and recently broke up with a boyfriend on a rather bad note.
According to her, her ex was controlling and emotionally abusive, although I’ve learned not to take her words too seriously. When she first mentioned moving to our city, my husband suggested she stay with us temporarily until she found her own place. I wasn’t keen on the idea, but I agreed because I thought it would only be for a couple of weeks.
That was two months ago. There are several reasons why she’s been living with us for so long, but none of them are reasonable. My sister-in-law made excuses about why she couldn’t find an apartment. Everything was too expensive, or in a bad area, or didn’t have something she wanted.
Details one has to accept when one’s budget isn’t the best. You can’t expect to have two bathrooms when you don’t even have a job. I began to suspect that she had no intention of moving. About a month into her stay, I noticed changes in her behavior around my husband. She started dressing differently when he was home.
Scoop neck, short shorts, the whole package. Then I noticed how she constantly needed his help with the most ridiculous things: her phone needed to be set up, her laptop was crashing, she couldn’t figure out how to use the TV, even though she’s not a techie, at least not a techie. My husband didn’t see anything wrong with that.
When I mentioned that his sister seemed to be finding a lot of excuses to get his attention, he said I was exaggerating, that after all, they were siblings, that they’d known each other their entire lives, and that she couldn’t possibly think anything strange about him. Then came the bathroom incident. My husband was taking a shower, and despite the closed door and the obvious sound of running water, my sister-in-law accidentally walked in.
I was in the kitchen and heard her laughing, followed by an exaggerated, “Oh, God, sorry.” When she came out, her face was flushed and she was smiling a little smile that made my blood boil. When I asked her what had happened, she just said she didn’t realize he was there. That night, after my sister-in-law went to her room, I confronted my husband.
I told him I didn’t like the way his sister was behaving toward him and that he needed to set boundaries. He got defensive, saying she was just being affectionate and that’s how they’d always been as siblings. That was a blatant lie. I’ve been with him for eight years, and I’d never seen them act like that before. The discussion ended with him reluctantly agreeing to talk to her about respecting personal space, but I could tell he still thought I was overreacting.
A week later, I had my chance. My husband left his phone on the counter while he went out to take out the trash. It was unlocked. I checked his messages with my sister-in-law and saw that the most recent conversations had been deleted. I thought this was odd, since he never deletes messages. I knew there were ways to recover deleted texts.
After a quick search, I found an app that could help. What I discovered turned my stomach. My sister-in-law had been sending my husband inappropriate photos and messages filled with innuendo. Things like, “I’ve always wondered what it would be like to be with someone like you. You never think about what it could have been like if you had met me first.”
My husband’s responses weren’t as explicit, but they didn’t stop her either. Mostly things like, “Are you crazy, or shouldn’t you say those things?” He never once told her to stop or that it was inappropriate. When I confronted him with what I found, he got defensive again, saying he never encouraged her and was just trying to handle it without making a big deal out of the situation.
According to him, he deleted the messages because he didn’t want me to see them and get angry. Too late for that. I ordered a small security camera and set it up in our living room at an angle that captured most of the common areas. The footage I captured in the following days confirmed all my suspicions.
When I wasn’t home, my sister-in-law would walk around in just a towel after showering, conveniently timing it for when my husband was in the living room. She would crouch down unnecessarily in front of him, touch his arm or shoulder whenever he spoke to her, and generally act like a teenager with a crush. The most incriminating recording came two days later.

I was at the store, and my husband was working from home. My sister-in-law approached him while he was on the couch with his laptop, sat next to him, and after a brief conversation, leaned in and tried to kiss him. To his credit, my husband immediately pushed her away and stood up. He seemed angry. He said something I couldn’t hear clearly on the audio, then grabbed the laptop and went into our bedroom, closing the door.
When I got home, he didn’t mention anything about what had happened. That night, I showed him the video of his sister trying to kiss him and asked him why he hadn’t told me. He was clearly embarrassed, and he admitted that my sister-in-law had been making advances for weeks. He claimed he’d tried to handle it without causing a family rift, especially since she was vulnerable after the breakup. I called that excuse rubbish.
His loyalty should have been to me, his wife, not to his sister, with such predatory behavior. The next morning, I waited for my husband to leave for work and then showed my sister-in-law the recordings I’d gathered. Her face went from stern anger to fake tears in seconds. When she realized crying wasn’t going to work, she dropped the act and admitted everything.
She said she’d always been jealous of me and had had feelings for my husband for years. According to her, he’d given her mixed signals and encouraged her since she moved out. I knew that was a lie. My husband can be conflict-avoidant and too passive to nip in the bud, but he wasn’t encouraging them.
I told my sister-in-law she had 48 hours to pack her things and leave the house. She started crying again, this time saying she had nowhere else to go and couldn’t afford a place on her own yet. I didn’t care. I called my in-laws that same day to let them know what was happening. They’ve always been fond of me, but my sister-in-law is the spoiled brat, so I wasn’t surprised when they initially defended her.
They suggested that maybe I was misinterpreting, that something like this couldn’t happen between siblings. I emailed them some of the videos. 20 minutes later, my mother-in-law called back, apologized profusely, and said she had no idea her daughter would do something like that. Still, they asked if we could handle it discreetly to avoid embarrassing the family.
I told them I wasn’t interested in making a public scene, but I also wasn’t going to allow my sister-in-law to stay in our house even one day longer than necessary. When my husband arrived that evening, I told him about my conversation with his parents and my ultimatum to my sister-in-law. He fully supported me.
He went to my sister-in-law’s room and told her he had to leave right now. She tried to manipulate him by crying and claiming I was kicking her out, but he wouldn’t budge. The next day, my sister-in-law packed her things while giving me dirty looks. As she left, she turned to me and said, “This isn’t over. I’m going to ruin your marriage anyway.”
“I just slammed the door in her face. It was better that way.” The following weeks would prove that kicking her out of our house was just the beginning of our troubles. She wasn’t going to accept defeat so easily and was willing to go to extremes to try and get what she wanted, even if it meant destroying her relationship with her entire family.
One night, about two weeks after my sister-in-law moved out, my mother-in-law called us in tears. Apparently, my sister-in-law drunk-called her and gushed about how she’d fallen in love with my husband and how she didn’t think it was wrong because, after all, she was adopted and didn’t share blood; they weren’t real siblings.
At least with that, she had deliberately admitted that she had tried to seduce him and break up our marriage. That call changed everything. They told us they had been sending him money monthly to help with expenses, but after hearing his confession, they decided to cut off the funding. A few days later, we received a frantic call from my sister-in-law.
She was being evicted from her new apartment because she couldn’t pay the rent without her parents’ financial support. She begged us to let her stay with us again, promising that she’d learned her lesson and would respect our boundaries this time. My sister-in-law was so desperate that she inadvertently admitted to all her manipulative behavior, saying things like, “I know I shouldn’t have tried to break up what you had. I was just jealous of what you have.
“I recorded the entire conversation just in case. Needless to say, we refused to help her. My husband told her she’d made her decisions and now she had to live with the consequences. He suggested she contact friends or look into emergency housing options, but made it clear our house was no longer available to her.
The final straw came when I discovered my sister-in-law had copied some of my personal financial information while staying with us. She tried to open credit cards in my name, presumably to get us into debt and cause problems. Luckily, the applications were flagged as suspicious and rejected, but it was a wake-up call.
We immediately froze our credit and filed reports with the appropriate agencies. When my in-laws learned of this latest incident, they were horrified. They called a family meeting with extended family to discuss the situation. At that meeting, they publicly announced that they had disinherited my sister-in-law and explained why.
They shared the evidence we had gathered—the videos, the recorded call, the attempted credit card fraud—with family members who had been sympathetic to my sister-in-law’s story. That’s how my sister-in-law’s Alabama attempts came to light. In the following weeks, we learned from several people that my sister-in-law’s life was far more than bad.
Without financial support from her parents and with the news of what she and her brother had done, she was struggling to find a place to stay. She also couldn’t find stable employment. The last we heard, she was staying in cheap motels when she could afford them and on acquaintances’ couches when she couldn’t. I can’t say for sure if these acquaintances knew about her behavior, although some of them decided it wasn’t a good idea to let her stay in their house.
She tried to seduce a roommate’s boyfriend, so she ended up getting kicked out too. Honestly, I don’t feel bad at all that she’s having a bad time. It’s not like she’s some poor, helpless victim. She tried to seduce my husband, who just happens to be her brother. I don’t know why she thinks it’s okay, just because she’s adopted.
Just the fact that I’ve known him my whole life, that she treated him like a brother, is disgusting to me. Edit: I don’t know how long she’s been in love with my husband or whatever her feelings are for him. She found out about his adoption a few years ago. The fact that it started later, I still think it’s pretty bad, but if she was doing it before, I think it’s much worse. Update one.
I thought that with my sister-in-law out of the house, everything would go back to how it was before, returning to my husband’s normal. But nothing is normal with my sister-in-law. I know I was really upset about having feelings for her brother, but now I think it’s even more Lulu’s. A few days after my post, my husband and I were out of town for the weekend visiting some friends who lived a few hours away.
We received a call from our neighbors asking if anyone had stayed at our house to look after it. The obvious answer was no. We didn’t need anyone because it was only the weekend. Our neighbor’s security camera captured my sister-in-law entering through the door to the backyard. Then, on the camera of another neighbor whom we contacted to find out what she had done, we saw her trying to open the door.
When he couldn’t, he tried to break a window. When we saw what was happening with the second neighbor’s recordings, we called the police. They arrested my sister-in-law for attempted burglary after a few hours of searching for her. We drove home immediately and met with the police. They asked us to make a statement and file a formal complaint, since, as a family member, we might have given her some kind of permission to be in our house.
Since we told the police no and that she had no right to be there, not in our absence, not ever, she was questioned. She claimed she was just trying to retrieve some personal belongings she’d left behind when she moved out, which the police knew because we told them, and that she really needed them.
The police didn’t buy this excuse because even if there were some of her belongings inside the house, that didn’t give her the right to enter without anyone’s permission. Even worse, the police confirmed there was nothing of hers. She also couldn’t specify what kind of belongings they were. She was quite vague in her description. We also informed the police that my sister-in-law had stolen my personal financial information.
It wasn’t enough at the time for a report that would lead to anything, but this time it was a serious pile-up. Breaking and entering, theft of information, everything. My sister-in-law was detained on bail she couldn’t afford. No family member was willing to help her, not even her parents.
In the end, she got a public defender to release her because she had no criminal record, but now she’s gotten one for all of this. They also ordered her to stay away from our house and us personally. My in-laws have finally officially removed her from the will, and as far as I know, no one on my husband’s side of the family is in contact with her.
Update two. If you remember me, I’m the OPE, whose sister-in-law, my husband’s adopted sister, attempted a set home a la bama. Then the sister-in-law was cut off by her family and also arrested for trying to enter our house without our permission. I was convinced that would be it. Even my in-laws were on my side and had disowned my sister-in-law.
For a while, we didn’t even hear from her, except that she’d moved to another city and practically disappeared. That was until she basically came back into our lives, or more precisely, into the life of my husband, whom I should call my ex at this point because we’re going through a divorce. A few weeks ago, I saw a rather strange message on my husband’s phone.
It was listed under another name. It didn’t say exactly, my sister, the mistress. I started reading, and the conversation itself was quite strange, but there was nothing incriminating. But it was noticeable that there were deleted messages and that there was more than I’d seen. I checked the deleted messages again with a chat, and from the deleted conversation, it was clear that my husband had a mistress.
There were things like they were seeing each other for sex and also professing their love for each other, and that on its own would be bad enough, but there was even more to those messages. He affectionately called her his sister, so there was no doubt who his enigmatic wife was. And I know that many here in the comments said on my first posts that it was strange that my husband didn’t nip this in the bud, but since he agreed to kick her out and since my investigation didn’t show anything more going on, I never suspected anything else. Even
All the messages I could find this time are only a few months old. So I’m pretty sure the romance is fairly new, although they may have been tempted in the past. Anyway, no matter why, new or old, I’m divorcing him. Of course, I asked him, and according to his story, it started recently, but it doesn’t matter anymore.
For those curious, who might care how it started, she says she contacted him a while back to tell him she’d been living just two hours away. She’d found a job and even a permanent place to live. At first, it was just texting to catch up, but they eventually saw each other once she came to visit, and from then on, the texts became more and more oriented toward her feelings, which, as we now know, were fully reciprocated by my soon-to-be ex-husband.
He would visit her in her hometown, or she would come here for their get-togethers. Some people didn’t mind my sister-in-law’s feelings about my husband, even though he was my husband, because according to their logic, they weren’t real brothers. Maybe I’m the odd one out here, but if I were raised my whole life with someone I called brother and then told them he was adopted, I couldn’t see it any other way.
Even if I knew it from the start, it’s still too hard for me. I wish Reddit comments had their hometowns next to their names. I’m not sure, but I think a lot of them would have the Alabama flag. I’m joking, but it’s weird that so many comments say they don’t think this is so bad.
Either way, this has brought a new wave of family drama with my husband’s family, which, thankfully, isn’t drama directed at me, but it is drama nonetheless. My sister-in-law was already completely cut off from the family, but now my husband has also joined this exclusive list of two. They’re basically the two sick people who can’t keep their hands off their siblings.
At this point, I’d rather have been cheated on by something more common, like her friend, her ex, or a coworker. At least then I wouldn’t be the woman who cheated on her sister. I also know the kind of comments I’ll get from the guy now, but that’s what you get for not leaving your husband sooner.
I’m not saying they’re wrong, and I won’t deny that I was a fool, but being the OP cheated on by her husband with her own sister isn’t much worse than being the OP whose husband officially started dating her sister during the divorce. Because another thing that’s been happening is that my husband is basically in a relationship with her. It can’t just be me and her family who see that as a bad thing.
Although friends and acquaintances also raise an eyebrow when they find out, I think they’re just waiting for the divorce to be finalized to make it official. Although I don’t see how a divorce could cleanse this whole situation and make it look better. Their family is completely disgusted with the situation, and I’m just waiting for this to be over once and for all.
If they want to explore the Alabama coast, at this point I don’t care. They won’t be the first, nor the last, but don’t count on me to witness it. Edit: There’s not much to say about the confrontation I had with him when I found out everything. I was basically patient enough to listen to his side of the story, even though it wasn’t going to solve anything.
And then I was calm enough to tell him to leave the house. There was no point in arguing. When I figured everything out, I knew the nature of this alone was punishment enough for him. He had nowhere to go because he knew his parents wouldn’t accept him, because I told him the first thing I would do was call his parents, and I did.
I told him I didn’t care where he slept, he could go to his sister’s house. In another situation, there would be nothing wrong with sleeping over at a relative’s house after an argument. In his case, we already know. I don’t know where he spent that night, but I don’t think it went much further than that, because their relationship—I mean, openly, it started a few weeks later. Update three.
It was interesting to learn so much about incest in the comments on my previous update. People from all over the world were asking whether or not there were charges in their jurisdiction, which, as I learned, varies by state and county. Well, there are penalties here. Not as severe as some places where there are prison sentences of up to 10 years, but the two received an $8,000 fine.
Here, it doesn’t matter if they were blood siblings; as long as there’s a fraternal bond, it’s enough to receive a fine. And since this situation has been going on for a long time, they received the appropriate punishment for it. I must also say that my divorce was partly to blame for this, because in the grounds for divorce, my lawyer took it upon himself to argue that it was due to infidelity and then that the third party was his sister.
With that, we got a very good divorce, with a favorable division of assets, but also this little revenge in the form of a fine for both of us. When I say $8,000, I mean each of us. It’s not a shared fine or anything like that. Or to be clearer, we can say that both of us will have to pay $16,000. My lawyer was also surprised, since, not being a criminal lawyer, he didn’t know the penal code perfectly.
I only knew that as grounds for divorce, that was a very strong card in our favor, which served as a way to indirectly press charges against them and thus force them to pay that fine. Now I don’t know what’s become of them. Their family has completely cut them off, and my limited interaction with them isn’t to discuss what their children did.
I’m sorry if I ruined your plans to make it official, but the papers still exist showing they’re siblings, because legally they’re both still children of my ex-in-laws. I have a couple of ideas now, like, for example, asking a judge to declare that they’re no longer children of my ex-in-laws, so they can do whatever they want with that.
But if I’m honest, I’m so tired of it all that they can be happy however they want as far as I’m concerned. I’ve gotten all the karma I expected from them. Luckily, in my personal life, outside of Reddit, people do see what they did wrong and have ostracized them. I plan on this being my last update on the subject. I won’t be making my updates much longer.
If they manage to make their love story end happily, not in a Disney-style way for obvious reasons, good for them. Although Disney lately, I don’t know. M.