Dirty Thoughts In My Head

My girlfriend's sister was lying in bed at our place one night after going out. As she stayed the night, my girlfriend was downstairs watching TV, and her sister was having a little play under the covers. Knowing that the bedroom door does not shut properly, I thought I'd take a peak. It was amazing. The noises she was making were wild. Actually, the noises I was making playing with myself outside were pretty loud, too. I don't think she saw me, but I can't stop getting dirty thoughts in my head about her. It was fantastic. I want to shag her brains out.

— Ulrich, 23