Mother and son are lying in bed together one night, and mom starts to explain how he is getting too old for that anymore, for them to be laying together. He probably wants his "alone time" at night to do other things... bring home girlfriends and that kind of thing.. but Mom is shocked to learn that her son hasn't delved into the world of masturbation yet, he tells her he doesnt know how to do it. Like a good mother, mom decides it is her duty to teach him.. nothing wrong with a mom helping out her son right? Mom enjoys her teaching duties a whole LOT and when all said and done her son has learned much more than just how to cum, now he knows how to make her cum too! She really is great teacher, way to go Mom!