You are driven by lust

The decision to keep Frankenstein interested is driven by your own desire to get off. You look up at him, biting your lower lip and squeezing your titflesh with both hands, you smear his cum into your tender bosom, letting your spunk-juiced fingers caress your huge, sensitive nipples. Frankenstein actually smiles at your lusty display and you sit up, wrapping an arm around his slim waist to hold him in place over your thighs.

He offers no resistance as you reach down and find his dripping cock with your fingers. You wrap his soft fuckmeat in your hand and give him a gentle squeeze. He shudders in response. You kiss his hairy chest as you begin to stroke him. His skin smells like the chemicals he has been working with in his laboratory. You flick a tiny nipple with your tongue and kiss up his bony chest to his neck, mashing your huge breasts against him, stroking his cock with more purpose.

"Oh, professor, I'm so turned on," you moan, rubbing your thumb over the swelling head of his cock as you nibble at his shoulder.

"You are quite a specimen, Miss Finch," says Frankenstein, looking down at your enhanced physique. "Such wanton lust is commendable. I always detested your prim and proper classmates."

"I'm not like them at all," you promise.

You lean your head back and jiggle your titanic tits so he can see them swaying and feel your jutting nipples dragging against his body. You continue to wank his cockmeat, feeling it stiffen fully in your hand. Frankenstein runs his withered fingers over your titflesh and up to your mouth, teasing them across your full lips, smiling as you flick your tongue out and lick at his fingertips. He pushes his index finger into your mouth and you suck, hollowing your cheeks as you draw on his digit.

"Perhaps I can find another use for you," says Frankenstein. "I cannot rely entirely on this dimwitted hybrids I've created, and my ooze troopers are even dimmer. Hyde is not entirely reliable. What do you say, Miss Finch?"

"Hmmmm?" You wank him a little faster, not certain what he is getting at. You smile up at him, playing the dumb slut for his entertainment.

"Join me," he says. "Become my assistant and help me destroy Paisley and you will have more power than you can imagine."