So apparently I was really offensive at a party one night... What to do?

Ok so a couple of weeks ago my bro had a big keg party with over 50 people. Now to start this off I will point out I'm not very good at picking up girls plus get anxiety and drink too much in big groups and when I'm drunk I think I can pick up anyone. So apparently I started off the night after beer 9 dancing with my shirt off and made some really offensive comments to this one girl who happened to be married to my sister in laws cousin's wife. I basically said straight up that I thought she was hot and hit on her a bit too much and it didn't work out. Of course I heard about this the next day completely hungover and suffering from amnesia. Then my bro was making stuff up just to mess with me so I don't know if I believe it or not and my sister in law says nothing happened. So I don't know who to believe! What if I run into the girl again? I'm a douche when I'm drunk and tend to get Rob Ford drunk after a few beers, but when sober I'm usually a good guy. Any advice here?