Your step mum would like your help with deciding on which dress to wear for her date with your father this evening. Frankie is clearly very comfortable with undressing infront of her step son and it's getting you a bit too excited. Your step mum notices your erection and feels it's her fault for undressing infront of you, so she offers to assist you with your cock and even strips down to her stockings and pours oil all over her juicy tits!