I slept with my (cheating) boyfriends brother...

Okay so I'll explain.

I met a guy and we dated but I found out he had a girl back home (he was living here for awhile)

I trusted that he just wanted to be with me. He told me she was crazy and not to talk to her if she msged me online. She did btw, and told me was pregnant (a lie)

Me and him had a fight and she came to visit right after that. He told me she visited one night after he had convinced me to come hang out.

His brother was hot and mostly we three would play video games and drink together and then my (now ex.) fell asleep on the floor in the living room. His brother offered me another drink and I said I'm good and we made out and had sex on the couch. Way better than his brother was.

I never slept with my ex again but he invited me to a party one time and I went. It was awkward cause I found out he was STiLL with that girl. I called him names and his brother drove me home.

I regret not doing it again w his brother that night. It was so hot before. I was just so mad I wanted to go inside.