Anonymous and eager, I slide into bed beside my unsuspecting stepsister, her eyes covered by a tight blindfold. As she stirs, I guide her hand to my throbbing cock, her curiosity piqued. She tentatively strokes and sucks, her inexperience evident yet thrilling. I face-fuck her, my huge cock sliding in and out of her warm, wet mouth. She gags, but I hold her head steady, my stress melting away. I pull out, my cock glistening with her saliva, and erupt, painting her face with my hot, sticky cum.