Your step-sister has come home from yoga and her ass is looking right. You've always found her sexy and her ass fat so you find any reason to mess with her. Your parents are downstairs and you have stepfamily over so after a little persuading, she tells you to keep it down. You fuck her brains out on top before getting behind her fat ass, spreading her giant cheeks so wide that her asshole winks at you and fucking her doggystyle! She slurps your dick up with those huge lips of hers and you return the favor by eating her sweet wet pussy. Gotta love stepfamily!