Wrong behavior of boyfriend

Fereshte

I had a birthday party for my boyfriend, after dancing I went to his sister's room and slept because I was not feeling well, but she stayed up until 6 am, but now that it is 6 am and they finally decided to sleep, my boyfriend and two of his boyfriends slept together and I got upset, I think he should not leave his partner under any circumstances to go sleep with someone else, I called him and said to him it's ugly to sleep with someone else when you have a partner! He said that I don't want to leave them alone, I said that you were with them until the morning, and you shouldn't be with them when they sleep?! He said no, I don't want the cats to jump out on the balcony (we have two bloody cats). I also told him that he told me that he should not go to sleep with someone else when he has a partner, and he decided to go and sleep with his friend.