Prude step-mother-in-law has a moment to herself and is relaxing by reading a book. An overbearing urge to touch herself comes over her. She tries to resist it but her pussy is wet and tingly. She slowly gives in playing with herself. Much to her horror she forgets her step-son-in-law is coming over to help her with some decor around the house. She walks in to see her playing with herself. She isn't stopping and he isn't leaving. He takes out his cock and jerks off while she continues to rub her wet cunt. They both cum while looking at each other play. An overcoming feeling of guilt creeps in as the step-mother-in-law doesn't know what to tell her step-daughter about what just occurred.