Your step mom was coming to bring you laundry when she catches you jacking off. You jump but she lets you know its only natural. She comments on your dick size and wants to help you. At first when your step mom slides your dick into her mouth you question her, but she assures you its fine and as your step-mom its her job to teach you these types of lessons before you start dating girls. You decide to let her keep going until you bust all in her mouth.