In this adult role-play, my drunk stepsister comes to my apartment with a female friend who missed the last train, and the three of us sleep side by side. Her friend tosses in her sleep until her clothes fall open, exposing her panties and breasts. I finally give in, touch her, and get hard. Instead of getting angry when she notices, she welcomes me and starts having sex beside my sleeping stepsister. My stepsister realizes what is happening, secretly gets turned on, and joins us for an unexpected threesome.