My girlfriend and I have been in an open relationship for 2 years, basically we have sex with 2-3 other people every week and then we openly share information and giggle and laugh about it.

I feel our bond is way deeper than anything I’ve felt before but that’s why we both agreed to an open relationship in the first place. We both wanted someone reliable and we really loved to see at the end of every day.

Two days ago my had girlfriend told me at dinner that she was no longer going to sleep with anyone but me. I asked if she’s sure of her choice and she said yes. We laughed and joked a bit and continued and I thought nothing else of it.

Last night I slept with this girl and returned home. When I arrived I told my girlfriend about what happened and she burst out crying, and began lightly hitting my chest in like a sad angry way. I was very confused, she  said I was cheating and was fucked up for ruining her trust. 

I told her she was being super unreasonable since I hadn’t said I was going to stop the open relationship. She didn’t ask or tell me I needed to either.

So basically I’m on the couch tonight, not sure what happens next.

Am I the asshole?