You're very worried about the trip your going on with your sister. What will you do without your mom helping you with your medical problems? You need to be medically expressed of cum multiple times a day and you can only masturbate so many times. "What about your sister?" Cory suggests. She won't do it, your sister hates you. Cory gives you some blackmail material just in case she doesn't do as you want. "In fact we haven't done that today," your mom says. She gets on the ground and opens her robe revealing her tight body. Pulling down your pants, she slides your cock in her mouth and sucks you as only a mother can. Lovingly she sucks and strokes you until you cum in her mouth. Full of cum, she swallows with a smile. You are going to miss your mom so much this week. Now if you can just convince your sister.