Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: This is more complicated then the title suggests. My best friend of 6 years broke up with his now ex around 4 months ago. They dated for about 2 and a half years. 

They didn’t end on super bad terms he just knew that he didn’t want to be with her anymore. He told me he had fallen out of love with her and really didn’t care about her anymore. 

Well after they broke up they were still having sex casually which is stupid in my opinion but hey that’s them. One of the times they were texting he told her he couldn’t mess with her so she instead mentioned me.

He started questioning her and she admitted that she found me “irresistible”. He immediately texted me this when she told him. He basically told me to do whatever I wanted because they’re done. 

She’s attractive and I have always thought so. Of course I wouldn’t act on things while they were together but since they’re done I figured why not hit her up. 

I need to make this part clear he told me it would be okay if I fucked her and that he didn’t care about her anymore. So I hit her up and we agreed on meeting up just to have sex. 

Well about a week ago my best friend and I are out at dinner and his ex comes up in a conversation. I don’t like keeping secrets from him so I told him that his ex and I had sex. He immediately freezes and tells me that I should probably leave. So I left. 

After that night we’ve hung out multiple times and things felt really weird. Tonight he told me that he’s angry with me and himself. He told me that he didn’t know that it would hurt him this bad. I feel bad for him and I obviously drift want to hurt him. I love him, he’s as close as a brother to me.

I’m just as messed up about the whole thing as him. His friends are telling him to drop me because “you don’t just fuck your best friends ex”. I’m not going to justify my actions in anyway except purely that he told me that I could sleep with her.

Well have at it. AITA?

having sex with my best friends ex