Trevor pumps away as you feel his heat inside you, filling you.
You feel yourself stretch suddenly. Your being is becoming larger but your senses are so different now you cant tell exactly what is hapening.
Trevor however can. As he grunts and moans he looks down to see his speedo in a pile around his ankles. The head of your clone is busy at his crotch, but the red rubber of the balloon that was you is no longer just covering his balls and cock. You are spreading slowly over him, before Trevor can say "Ungh..." you are covering his ass and waist like a pair of red rubber underwear.
Trevor pulls himself away from the clone with an immense effort of will and stares down at himself as you spread over him, tight and shiny, smoothness coating his skin.
"Looks like your friend there likes you. I like you too of course, but I'll probably like you even more in a minute." the clone grins from ear to ear as he watches Trevor.
"I wonder what that feels like. I have only gone the other direction myself. Looks kinda fun." the clone says as he reaches out and grabs Trevors shiny rubberized dick in his hands.
"Dont. Ugh... yeah. Do." Trevor changes his tune as the clones hands close on his member. Its pliable but firm, like its not just coated in rubber but is made of rubber, latex 100%.
You continue to spread over Trevor, down his legs and up his chest. Without warning Trevors dick inflates to a long balloon and he moans.
Nearly done now you spread all over his face and hands as the clone conitnues to play with his rubbery parts, bending them and giggling as Trevor moans until you fill his mouth and he cant moan anymore. His torso becomes rounder, fatter, he infaltes entirely and looks like a man-sized balloon toy.
The clone backs up and looks at Trevor grinning.
"Excellent. I think I'll keep you."