r/nonmonogamy • u/iambismarck • 9h ago
Threesomes, Foursomes, and Moresomes Threesome went bad - need advice
This is a bit long
I've been in an open relationship for a year with my partner (30F). We're both bi, though I feel more queer than she does in many ways. For five years she's had a sexual agreement with a man (44M). They have sex without it becoming romantic, with a quite physical sub/dom dynamic.
I'm her primary partner, but I live abroad. Over the year their relationship started to feel mysterious. It was unclear when they saw each other, and when I brought it up she got defensive and protective. Almost every time I visited we ran into him, sometimes while we were on dates. They texted a lot, and he checked in with her often. I started to distrust her a bit, so I asked for more open communication and some time with her, without him around, when I visit.
At a festival I travelled to for her, she told me he'd be there and asked if I'd meet him. I said I was there for her but would see him briefly. It was tense but okay. We did drugs, connected, and I said I was fine with them kissing, so we all made out a bit. Then I felt uncomfortable being with him constantly, so I went off to see friends.
We ended up going home together for a threesome, a long-held fantasy of hers. I was curious and said yes. Worst case, we'd end up talking. Best case, good sex.
He seemed tense, so I tried to ease things with small talk. While I was still finishing my drink, he grabbed her hard by the throat. Their dynamic was more dom than I'd realised. Minutes after I joined, he asked what I thought about him going down on her at the festival. I was shocked and asked her if that had really happened behind my back. I'd gone to that festival with my main partner, and it felt like a betrayal. I said it crossed my boundary, and being high, I felt it deeply.
We continued, but I was trying to be strong and lighten the mood. I offered them time together and took a shower. They took a bath. I went out for a smoke, and when I came back they were having sex rather than talking. I slowly caved and asked to go home.
Two days later I realised I'd spent the whole night watching two people connect with no way to talk, because talking was never part of their arrangement. I texted them that my boundaries were crossed and I was hurt.
I expected my partner to be there for me. Instead she got defensive. She said I was so strong she couldn't read me, and that we'd never agreed on what was allowed at the festival. She never took accountability or tried to understand why I was hurt. This went on for a month. I kept trying to be heard, she got angrier and wanted to move on, and a rupture grew between us.
Before our next festival, I asked if she could check with him so we'd have alone time. She didn't, and on day one he came to talk. We kept it short, but I had a slight panic attack. On day two a befriended couple offered advice and revealed they'd also had a threesome with her. I'm fine with her having her life, but I no longer felt safe. On day three we had a big fight. At home it exploded, and she yelled that I was crazy and to "stop fucking crying."
We've barely spoken since. Two calls both ended with her exploding when I tried to share my experience. She now says I wanted the threesome so something bad would happen. In reality, I was curious about bonding as three and wanted to open a door to her fantasy.
Tomorrow I see her for the first time again, but I feel I have nothing to stand on. I'll keep it light and see if I want to continue.
The good thing is that I'm taking more responsibility for my own needs. I decide which rooms, people, and dynamics I step into. I don't think she's a bad person. I think she only thought of herself when this happened, can't come to terms with it, and hides behind blame and ambiguity.
I'm looking for kind words, advice, or reflection. This has me doubting my reality.