When I was in college I roomed with three other women and we shared a two bedroom apartment. I awoke one night for some unknown reason and heard my roommate masturbating, I lay there for a few minutes listening to her fingers going like crazy on herself before I pulled my covers back and got up. She stopped immediately and was not moving at all as climbed onto her bed, the room was totally dark and I felt my way to her legs. She did not even let out a word as my lips found her hands still on herself. I pulled them aside and started licking her wet lips until she came in a shuddering orgasm that was so awesome. She told me she was sorry for waking me up but she herself had woken up from a really great dream and was so turned on she just had to have an orgasm.
We slept together most nights and had about two years of mind blowing sex before we graduated and moved on with our lives.