The night was restless. I just returned from a wicked party and could not fall asleep. After another half an hour of torment, I decided to go drink some water, but when I was in front of my stepsister’s door, I heard a noise. I crept closer, opened the door, and was dumbfounded by what I saw. Left alone in her room and thinking that everyone was already sleeping, my sister lay in her bed with her legs widely spread and masturbated her hot pussy…