I got drunk last night and fucked my girlfriend's best sister in the bar. But after waking up, the woman said to me that it doesn't matter, so she dressed silently.

For you who feel guilty in both ways, I think you should be honest with your girlfriend. To put it mildly, if you love your girlfriend very much, you should disown that woman. Although she is a virgin, if she didn't seduce you, you should not get too close to your friend's boyfriend (maybe it's a little harsh, don't mind if I'm just telling the truth). Only when you feel guilty will you cherish this relationship ~ ~ ~ ~