<human>: So my friend that I've known for 13 years has had this girlfriend for about 4 years now. They've been going through a rough spot for the past few months. Apparently he is extremely overbearing about the relationship, to the point of scarring her. She has told me and another friend that he has bruised her arm before by grabbing her behind her back in public if he thinks she's acting weird. He asks her questions constantly if she goes out and he never leaves her alone. It's like he thinks she belongs to him. Anyways she finally broke up with him after a long uncomfortable period between them. I didn't know her before my friend. He introduced us and we got along very well. I'm a pretty nice guy. Quiet and shy. I guess she liked that about me cause we talk almost constantly. My whole family is out of town and she came over to hang out to watch a movie. We didn't tell my friend about it because we wanted to hang out just us two and he wouldn't have understood and gotten angry. I guess he would have been right to be suspicious though because we ended up having sex. I felt so terrible afterwards. I hate myself for doing it. To make it worse though, we all had a little party at my house and ended up falling asleep in my basement,  and while everyone was asleep my friend took her phone and read our texts talking about having done it. I don't know why it happened. I truly do care about this friend, which is why I'm so angry and confused at myself for doing something like this. I guess I'm just looking for some feedback about what you all think I should do in this situation. I don't want to lose my friend over some shitty thing I did.

Can you give me the gist of the text in a nutshell?
<bot>: slept with my friends very recently made ex-girlfriend and he found out by reading the texts between the two of us.