'Please Dylan' cried Karen, 'It was just a bit of fun.'
Dylan turned round, 'OK sis, we can change back in a few hours.'
'And I bet youre going to give yourself one of these' said Karen, pointing at the very large fat penis between her legs.
Dylan stared at her crotch, suddenly unable to tear his eyes away from his sisters now massive cock.
'Oh My God, Dylan are you drooling?' laughed Karen.