Even as my cock is trampled by my little sister Mimi, it grows harder in an inexplicable reaction. She taunts, "You're turned on by seeing your shaved little sister, aren't you?" and spreads her pussy in front of me. Yes, you're absolutely right. Overpowered and nearly dazed, I still manage to thrust my cock into her pussy. Watching Mimi ride me in the cowgirl position, I slowly regain my pride as her older brother and switch to missionary. Finally, I shoot my load deep inside her, filling her womb with hot, fresh cum.