Vacation with Stepmom

Your stepmom knocks, says your dad’s hogging their shower, and you let her use yours. She drops her towel, tits heavy, nipples already tight. You slip behind the door and start stroking while she lathers up. She catches the motion in the mirror, eyes locking right on your hard cock. She steps out dripping, tells you turnabout’s fair play. You drop your shorts and she takes a long look at what she’s got you sporting. She hesitates when you suggest going further, but the idea of keeping this strictly vacation-only gets her thinking. Finally she nods, climbs on, and rides you like she’s been waiting all week for this climax.