I'm freshly 18, and still a virgin! My step-mommy knows I masturbate, and has the sneaking suspicion that I spy on her. One day she barges into room claiming dinner is ready, knowing that she is going to walk in on me jerking off. When she first comes into my room and catches me I am extremely mad and embarrassed. After a lot of coaxing she convince me to let her show me exactly what I need to know sexually. First with her hand, then her mouth, and then eventually her pussy. This is what a good step-mommy does right?