Jon grabs Sarah's clothes from his room, heads into the bathroom, and locks the door behind him. He turns on the water in the tub and lets it run a bit to warm up.
He takes off his gray shirt then lowers the denim skirt and steps out of it. He unties the bows of the flimsy blue plaid bikini he's wearing and peels it off of him. Immediately he looks down and sees Sarah's naked body and gets turned on. He feels how smooth his skin feels and how perfectly trimmed is the slit of pubic hair above his vagina. He touches it and quivers a little.
He turns and sees himself in the bathroom mirror. "God , Sarah has an incredible body!" Jon sighs as he sees his normal male head attached to this incredible body. "Well I shouldn't look a gift horse in the mouth I don't think there'd be any other way I'd see Sarah naked." He turns his body in various poses so he can examine his body from all angles then runs his hands up and down his new figure.
Jon daintily steps the nude cheerleader's body into the shower and closes the curtain. He sighs in delight as he feels the warm water against his skin. He grabs the bar of soap he'd normally use to wash himself, then stops and grabs his mother's soap, which is probably used for more sensitive skin. He lathers up his washcloth and begins cleansing his arm. Jon is really getting turned on and he softly scrubs himself with the wash towel all over his body.
He pauses for a minute and looks down at his soap-covered form. He then drops the cloth to the floor and begins playing with his breasts: first poking, then circles his pert nipples, then starts feeling up and rubbing his breasts. He moans in ecstasy. With the water washing off the soapy residue, Jon grabs one of his breasts and cranes his neck down so his can suck on his own nipple. "Oh, God, Sarah's tits are so sensitive!" he thinks to himself as he continues licking his breasts.
He knows he shouldn't, but can't help bringing one of his hands down to Sarah's crotch where he finds her vagina. He plays with it for a while still fondling his breasts. After several minutes, Jon can't contain himself anymore and plunges a finger into his pussy. He yelps in delight and begins masturbating, sliding his finger in and out of his vagina. He's so wet down there that he inserts another finger in and pleasures himself. He catches himself almost screaming as this new overwhelming experience feels exceptionally good. He finds the right spot below and he eventually explodes in bliss as he cums.
Jon sits in the corner while the showers warm water gently cascades onto his body. He pants in exhaustion with a huge smile on his face and thinks to himself, "I think I'm going to need a cold shower now "