Step-mom has called the plumber over. When he arrives she sends u off to your room. The plumber fixes the issue but the credit card machine is down so she trys to postpone the payment by seducing the plumber & teasing him... & u have just seen the whole thing. U decide to make her into putting on some lingerie and giving u a show too. Just as things are getting good the phone rings & she has to go answer it as its your father calling. U decide to follow her into the bedroom & start touching her ass. Shes annoyed but u arent going to stop after all she owes u a show. You come back in later when her and your dad are resting in the bed to cop more feels on her. Touching her ass and breast you get extremely worked up and upon waking her you find shes horny. She pleads with you to stop as your dad is right there but you take your penis out and move her panties, she grabs your penis & helps guide it inside of her. U both are so wrapped up in how good it feels that u cum inside of her oops.