She said bigger is better

Amy's pussy feels like a vice as she sinks down onto you again. You both groan and she kisses you hard as she starts grinding against your body.

"Did you get bigger all over...?" She wonders as she runs her hands over your shoulders.

"Bigger is better, remember?" You say with a grin as you push yourself to grow in front of her eyes.

Amy looks shocked and turned on beyond belief as your clothes tighter and tighter until they rip, your already muscular body becoming that of an Adonis, your pecs, shoulders and arms swelling, your six pack deepening. She stops just looking as you let her feel just a little bit more of your already massive cock.

"Fuccckkk, easy there. Let me get used to it and grow when I say" She sighs as her hips thrust against you and her eyes roll back in her head.

With powerful hands you hold her hips and drive her body against you harder and faster causing her nails to dig into your skin. Her breasts bounce hard inside her clothes and with a sudden motion you rip them off, exposing her big but perky tits. Not wasting a second you squeeze them and suck her nipples.

"Yes! Suck my nipples! Fuck, bigger! destroy my fucking pussy!" she shouts as you do.

Well, she asked for it.

As her body desperately drives itself against you, you let another inch of thick meat fill her, spreading her wider, pushing harder against the deepest parts of her. Screams of pleasure fill your ears as you reach what must be 13 inches of incredibly fat cock and you notice a bulge under her belly button as her **** riding brings you both closer to the edge.

"Fucking fill me UP" She screams as your balls gurgle, warning of the flood to come.

With a rush and a shout from you, your massive dick swells wider, sealing her tight pussy around it as cum surges into Amy. The first pulse makes her eyes go wide and her legs shake as she reaches a violent orgasm, the second fills her so intensely that you see her tight stomach fill out and the bulge of your cock disappears.

"My fucking god! My stomach! How much cum?!" She exclaims as she holds her stomach and even more cum fills her, giving her a sudden pot belly.

And suddenly it's over, you sit there gasping as Amy looks into your eyes in disbelief. Her legs are shaking and you feel cum starting to leak around your now slightly thinner cock. A cheer erupts from outside and you both give a sheepish giggle.

"Ow. You really did ruin my pussy" She groans as she rubs around her red and sore lips.

"I'm sorry, I got a little carried away."

"Don't be... I kind of like the ache" Amy says with a devilish grin "Fuck me, you really are a monster. Shall we face our audience then?"

(Feel free to leave a comment with a suggestion as to how you'd like this story to go.)