My girlfriend is not okay with having threesome


I had a threesome with my girlfriend yesterday. We had a deal that she will not be angry when she saw me with another girl. I thought she was okay definitely, at least she showed me so before. But after she saw me kissing another girl. She couldn’t take it anymore and call it stop. We didn’t have a really good time and the third girl left angrily. She was so unhappy. I will not have another couples dating in the future.