<human>: Can you condense the text into three sentences or less?

This happened last weekend at my buddies birthday party.  
  
So last Saturday my buddies wife threw him a surprise birthday party. My ex was there because my buddy happened to marry my ex's older sister. So I guess he'd be like an ex-brother in law? Anyway. My ex and I usually get along pretty well. We were together 7 years and have a 4 year old daughter together. I have my daughter on weekends so that night I got a babysitter and headed over to the party. More and more people showed up and we all got more and more drunk. Surprisingly my ex and I got along when piss drunk (I say surprisingly because usually when I drink with her around things become problematic).   
So after getting very drunk I end up on a couch in the basement. I woke up with a naked girl beside me so I thought fuck yea. Then I start noticing her tattoos. Fuck. I recognise one. And another. And slowly everything starts piecing itself together in my very hurting head. I try and get up quietly and without waking her but I'm hungover as shit and end up waking her up. She just kind of stared at me for a bit then looked down, then looked back at me. We quickly got dressed and went upstairs, not saying anything. I found my keys, ran to my truck and I was gone.  
  
I haven't talked to her in a few days and I'm really not looking forward to it.
<bot>: Went to a party that my ex happened to be at. Both got drunk, ended up banging her on the couch downstairs. Akwardness ensues. Not looking forward to seeing her when I pick up my daughter.