A couple weeks ago, my gf's hot sister was staying with us (long story short, we have a little history of attraction). We regularly shared our big bed (my gf in the middle of course) and we also got drunk nightly when she stayed.

One night while we were all sleeping and very drunk, I woke up in the middle of the night and noticed her ass was uncovered so I reached over and felt it up and it was GOOD. I kept feeling it and eventually got brave enough to feel up her pussy...and it was GREAT (she doesn't wear underwear to bed and she was wearing thin yoga pants...sooooo nice). I tried to go down her pants, but as I got my hand in she rolled over.

The next day, when we were up and getting around for the day, she just gave me a little wink and a smile.