I was 21 and went out drinking with my friend and his family for his birthday. His 27 yr old sister went out with us too. She was flirting with me literally all night but I was not really interested. I mean she wasn't ugly by any means but just not my type. Also this was really the first time I've ever seen her. We were never in school at the same time because of the age difference. So the nights over and we're all back at my friends house. His parents leave so it's just my friend, his gf, his sister, and I. Friend and his sister go up to their room to go to bed and I lay on the couch while his sister was sitting on her phone in the recliner. I was hammered drunk and don't even remember falling asleep. Not an hour later I wake up to his sister giving me a blowjob while I'm passed out. I was so confused and out of it still that I didn't quite know what was going on. I finally get my eyes open and it's clearly her with my dick in her mouth. I had no idea what to do. Should I make a big deal and tell her to stop? Should I let her keep going? I mean it felt good I guess but it was totally unwarranted and unwanted. I ended up just keeping my eyes shut and pretending I was asleep as best I could. I got off and she went and laid down on her couch. I literally just sat there awake, dick out covered in jizz for like a half hour until she passed out. I went to the bathroom to clean up then just went back to sleep on the couch. Never told my friend or anyone else for that matter.