He placed his lips over her navel - she felt cold to the touch, but in her was an ethereal substitute for warmth that was as good, if not better. This "warmth" only grew as he puffed her up, until soon he heard her voice.
"Hey, Matt. Ready for another go?"
"Penny!" he said, sobbing in a body that could no longer make tears. He grabbed her and kissed her.
"Whoa... you feel funny..."
Matt nodded. "Yeah - the spell you used - you probably should have read up on it. Anyone who inflates you by mouth from now on will turn into a love doll. Me, too. And if we're not inflated by mouth, we won't be able to move."
"...whoops. Uh, sorry."
He grabbed her tight, making a plastic squeak. "Oh, it's okay, it's okay, I'm just so glad to see you again!"
"Uh, what's gotten into you?"
He told her what had happened - how his roommate had come and tried to make a golem of him, how he had spent a month in limbo, how the headmaster had saved him, and how the headmaster had told him under what conditions she could stay.
"...and the golem spell?" asked Penny.
"Either the headmaster undid it or it doesn't work with Giles wherever he is now - either way, I can't feel it anymore."
"That's good," she said, and she lifted her legs over him and mounted his cock. Their organs stayed dry, but still slid against one another in a way they both knew natural dry plastic couldn't. Waves of pleasure went throughout both their bodies, but Matt stayed hard as a rock. Penny's orgasms built on each other until after about an hour she could take no more, and she lay down, panting. Matt was similarly overwhelmed, but stayed hard.
"Here's something I never thought I'd ask - you ever gonna come?" asked Penny between pants.
"I am coming, or I was. I was coming this whole time. Just... I don't think it goes down anymore."
"Guess that makes sense. Who wants a flaccid love doll?"
"Yeah - it's gonna be a bitch to hide, though."
"Yeah."
Matt looked down at his cock, thinking about the logistics of it - it was a problem that could wait. "So what now?" he asked.