Your arms change too, growing more tubelike and shiny. You feel the tightness encase them as your skin turns to latex and stretches out, filling with air.
You can still move though. Somehow you can move your balloon limbs and you turn to face Nate, squeaky sounds come from your body as you move. Your human torso is changing now too, becoming more rounded like a barrel and filling with air, becoming transparent brown colored balloon.
Your face is still normal for the time being. "Nate. Hawheehaw! Please help me. I can hardly move I fee-HEEAW so weird. Smooth and light. I want you to escape. HEEAW! you can get out of here." you struggle to talk. Your voice is queaky like two balloons rubbing together and whenever you try to speak you bray like a donkey more often.
Nate pulls his speedo off entirely now and looks down at you.
"Im scared, but this does feel good. I dont think we can get out. Soon we are going to be like that balloon floating over there. I dont know what will happen next HEEAW!" Nate pulls his hands over his mouth as he accidentally brays like a donkey too. "Im turning, but before I go, I want to try this."
He pushes his dock in to your mouth. You feel it feel your mouth and throat, pressing against your tongue. You dont care anymore. If it makes Nate happy then its good. You are becoming more and more balloon and you might as well let him have some fun. You feel your mouth start to turn to latex inside as Nate pumps.
"So good.. it feels HEEAW so good." Nate says as he pulls on your ears making little pops and squeaks.
Your face feels tight and you can see something between your eyes as you stand on all fours, with a balloon donkey body you see your own nose and mouth begin to push out from your head. You are growing a muzzle. Your skin is changed now and Nate continues to pump, making louder and louder squeaking sounds. He cums, lubricating himself as he pumps his cock in and out of your altering face. You can feel your throat has closed up in back and you cant talk anymore, even if you tried.
Nate pulls out and you see his dick is not flesh any more. Its rubbery, inflated, he is changing again. It becomes a tube sticking out in front of him and slowly shrinks back to him as his balls change and pull themselves up making him a little lump like yours, a balloon donkey package.
"You are getting smaller. I guess I am too huh? Thanks for letting me do that. I'll take you with me if I can." says Nate as you shrink. You are half your size now. Your face has completely changed and you resemble nothing more than a balloon donkey with rounded cute features set in your inflatable latex skin. You feel light, but you are still on the floor. At least you arent filled with helium.
Nate lifts you up and rubs you against his body, rubbing your crotch on his. The sound is loud and squeaky but feels amazing.
"Lets see if there is another door. Maybe through the showers."
Nate tucks you under his arms and head to the showers, his squeaky tail swaying behind him like an inflated stick.