If there was anything Eric knew about Lisa, it was how contrarian she could be. With that in mind, he decided to go for a reverse psychology tactic.
"This rat is all mine." He marched over to Tomtom and started stroking his chest fur. The big rat raised his head and chittered softly. "He's going to plant his seed inside me and make me his mate, and you're going to sit over there and watch and wait your turn."
Lisa didn't say anything. She seemed preoccupied, still idly kneading her clit and running her fingers through her labia. Eric could tell she was debating between what she'd said she wanted, and what her libido demanded now.
He'd have to take things further to spur her into action.
Eric reached down and started gently stroking Tomtom's sheath. Slowly but surely, his cone-shaped penis crept out of its hiding place, ready for action. It twitched slightly, and the rat seemed visibly more excited, squirming where he sat with his tail flicking back and forth. To Eric it was both disgusting and a little exhilarating...another of those unbidden thoughts he didn't want to allow himself to have, but he hoped the exhilaration showed, all the better to make Lisa jealous.
It worked. She let out a frustrated moan. "Oh, like hell am I waiting my turn. You have the gall to get my motor running without finishing the job, and then tell me I have to sit back and watch? No. Not this time Eric." He cheered internally while doing his best to look disappointed.
"No, you're going to watch. And to make sure you don't try to fuck this up for me, I'm giving you a front row seat..." She turned to the Chronivac.
"What? No, wait!" cried Eric. Before he knew what was happening, the room was growing around him, and so were his clothes. In moments he found himself 10 inches tall, cloaked in a thick blanket of his shirt and socks, and struggled his way out of them. Tomtom, now the relative size of King Kong, peered down at him with a look resembling amusement. One of his gargantuan paws dangled off the bed above him, and Eric was suddenly aware of how very...squishable he was at this size.
Lisa was stepping toward him. His thoughts turned to running and hiding, but he wasn't sure how much good it would do with the power she wielded. Still, he could dash under the bed...