What began as innocent camaraderie morphs into a haunting silence filled with unanswered questions and uneasy glances. In the quiet of the night, when the house should be a sanctuary, the painful reality dawns: the lines between family, friendship, and desire have blurred, leaving a man lost in a storm of confusion and heartbreak.

My wife (30s) and I (40s) have been married for a while. We’ve had an open aspect to our marriage for some time, something we’ve always discussed and navigated carefully. It’s usually with other couples or people we don’t have a strong personal connection with.
My nephew (19) has been staying with us for a few weeks. He’s a good kid, trying to figure things out, and we were happy to help him out. He’s basically like a younger brother to me, not just a nephew.
Things have been… weird. My wife and my nephew have always gotten along well, but lately, there’s been a different vibe. Lots of laughing, inside jokes, late-night talks. I didn’t think much of it at first, just figured they were bonding.
Then, a few nights ago, I came home later than expected from a work thing. The house was quiet. I went to bed, and my wife wasn’t there. I found her… in the living room, with my nephew.
Things had clearly happened.
I didn’t make a scene. I just… froze. They both looked mortified. My wife immediately started crying and apologizing. My nephew looked like he wanted the ground to swallow him whole.
We’ve had some incredibly difficult conversations since then. My wife is saying it was a mistake, a lapse in judgment, fueled by alcohol and the weird dynamic of him being here. My nephew is just shell-shocked and doesn’t know what to say.
I don’t know what to do. I feel betrayed, obviously. Not just because of the open marriage aspect, but because it was *my nephew*. It feels like a violation of a different kind of trust, a family trust.
My wife is begging me to forgive her, saying she’ll do anything. My nephew is talking about leaving immediately. I just feel numb and confused.
Am I the asshole for… not immediately shutting down the possibility of this happening? For having an open marriage in the first place? For not seeing the signs? Or am I the asshole for even considering trying to work through this, given who was involved?
Conclusion
The original poster (OP) is experiencing profound emotional distress, feeling deeply betrayed because the infidelity involved his nephew, which introduces a severe breach of family trust layered onto the existing boundaries of their open marriage. His wife is seeking forgiveness based on it being a mistake, while the nephew wishes to flee the situation, leaving the OP caught between feelings of personal betrayal and confusion over how to proceed.
Should the OP prioritize the violation of family integrity over the pre-existing agreement of their open marriage, or is the entire concept of their relationship structure fundamentally incompatible with maintaining necessary familial boundaries? Is forgiveness possible when the breach involves such a close, protected family member?
Here’s how people reacted:
You do realize this is going to blow up your entire family and they will be demanding, at the very least that you divorce your wife, and at most, will cut you out of their lives for this and for your lifestyle. No shade, everyone has the right to live their lives as they wish. Secrets always come out sooner or later so it is better to deal with things rather than hiding from them.
As for your wife, that is something only you and she can figure out. Alcohol is no excuse for mistakes, it is actually quite the truth serum in this situation. Alcohol does not put your good judgment to sleep, it does not stop your conscience from speaking to you when you are doing something your conscience disagrees with. The alcohol opens the door to let one throw away their self control and later blame it on the alcohol when it was in their heart and mind to do what they wanted at the time, that is all it boils down to.
There is not going to be an easy solution but your nephew should be your main concern in all of this.
In this situation you should have spoken up if you sensed something was off but, ultimately, your wife is responsible for her own actions. She had multiple opportunities to put a stop to the sexual dynamic continuing to develop. As the “mature” (I use that word loosely) adult in the relationship with him the onus of responsibility lies with her. Given the age and family dynamic there are actually predatory vibes here. She has crossed a lot of big lines.
Your nephew does need to leave. For his own sake as well as yours. Someone needs to have a serious conversation with him to see where he’s at emotionally. This is big thing and could negatively impact him, and his sexuality, for years to come. He needs to see a counselor to process this and his part in it.
As for your marriage. At the very least you both need to close the marriage at this time and enter counseling. You don’t need other people/feelings clouding an already murky situation. At most you need to end the marriage. You have to decide if you can live with this or not. Can you ever trust her again? That’s the question. A relationship is dead without trust.
You didn’t let it happen, they let it happen so they are the As here and all the guilt belongs to them.
If you decide you want to continue your relationship, I’d strongly recommend counselling both individually and as a couple. You need the help to deal with the situation and your feelings about it. Your wife needs it to understand why she lacks the moral and ethical fortitude to behave respectfully and to agreed standards.
No matter what you decide, your nephew needs to find other accomodations, you can’t heal whilst he’s still under the same roof. Whether you forgive him or not is up to you, counselling can help you here as well.
I don’t know how that means you let her do it. is she saying that someone can’t beat her house without her banging them? she needs to take accountability for her own decisions in life stop acting like things just happen. this was her home and she had control
But if those rules were not in place….. The best thing you can do is sort your own emotions as that is what you are responsible for always. Understand what you want and what outcome makes sense for you and then lean towards that. Be communicative and tell them you need time and don’t let anyone manipulate you going through the process.
If you can handle it, when she’s out of the picture, let him stay with you until he’s able to go on his own and ensure he is aware that age gaps are not appropriate in whatever type of intimate relationship. NTA
1/ divorce her and tell everyone what happened.
2/ divorce her and keep it quiet.
3/ do nothing.
4/ totally close the marriage from now on
5/ Close the marriage on her side only
6/ Get revenge by having sex with the person that will hurt her the most.
7/ Buy her a chastity belt and she stops drinking alcohol.
One thing you need to do now though is kick your nephew out. He is 19 not 16. He’s an adult and he needs to learn there are consequences for his behaviour.
Did you specifically talk about having family off limits? If you didn’t, well then she technically didn’t do anything wrong as it was an open marriage. Yeah, it is weird, but both were consenting adults.
If you did talk about having family off limits, then yeah, she cheated as defined in the terms of the open marriage.
Either way, she didn’t talk to you about it being OK before engaging with your nephew, so communication and trust were broken.
It’s not just the huge betrayal of trust, it’s that your wife has been downright predatory.
You didn’t let this happen. This is NOT your fault.
Did you have ground rules? If you decide to work things out with your wife then there needs to be ground rules about who is out of bounds.
If you don’t want to patch things up then I’d fully understand as it feels like the trust is broken and this could forever have an impact on your relationship with your nephew.
You two agreed to an open marriage. The few that I ever heard about were “do it somewhere else, not in our home”. I didn’t really think that you would have to include “and not with family “.
The fact that they both acted weird tells me that they both knew they were wrong. Alcohol is an excuse for weakness.
I don’t really understand what you’re asking. Are they blaming you because you didn’t set a specific boundary?
Let be real, she needed to bring it to you if she wanted to sleep with a) someone you live with, b) a family member. If she’s denying that, then she’s being purposely obtuse.
NTA
The problem is not having an open marriage, the problem is your wife broke the rules of your arrangement. It is especially galling considering the age of your nephew and the power imbalance between them. Only you can decide if this is something you want to try and move past. I’m not sure I could.
Grow the fuck up, grow a spine and talk to a lawyer, divorce her.
Open relationships are one thing, but this to me says something about her character that I couldn’t get past without divorcing her.
Good luck
Personally (and I think I speak for most) anyone I knew as a child I would be unable to find (or even think of?) sexually attracted to.
You & your wife are abusing your nephew.
Yes
Yes
Yes
Yes
You wanted to lead a hedonistic lifestyle free of morals and values. No commitments. Congrats. The scorpion you slapped on your back just stung your dumbass.
ESH
Your nephew? Cut him off completely.
You don’t deserve that no matter what.
Who woulda thunk it?
(Besides every person throughout history what enough to refuse to be part of an open marriage)
You had an open marriage, what did you expect would happen?
Your family should be minus a wife and a nephew…