Pete hunched over, fucking Jeanie hard and fast as she moaned, "Fuck me harder! Knock me up; give me all those MUSCLES!"
It was nonsense, but hot nonsense that made him fuck her all the harder: he loved the thought of his hot, hardbodied little girlfriend barefoot and pregnant, her slim figure bloated out with a fat, gravid belly. It was his private little fetish... One which it seemed Jeanie shared too in her own way.
She shook beneath him as she came, her arms pulling his head down into her heaving tits and smothering him. He could feel his groin get soaked with q musky squirt of her juices and he felt his own orgasm coming quickly. Every slap of his huge, taut balls on her pert ass brought him closer.
He drove himself home, hilting himself in her as she came again, his heavy testes lurching as he dumped the mother of all creampies deep inside her. She groaned as she felt herself filled completely and ground back against him as his orgasm continued with a squish of jizz overflowing her puffy pussy.
"Aahhh," she panted, "I can feel your sperm working... Making me pregnant with MUSCLE!"
Something about the sheer lust with which she said it made him hard as a rock again and he rolled her over, mounting her from behind to drill her into the bed. She was groaning as sweating as he pounded her, teeth clenched but meeting every thrust with a desperate push of the hips, coaxing him on.
It was going to be a long night.
/////
Jeanie put down the phone and rubbed her swollen belly protectively, her shiny belly flesh peeking out from under her t-shirt.
"Well, what did he say?" Pete asked, concealing yet another erection with his newspaper.
"Pffft," Jeanie waved the question away, "the usual: a ghost pregnancy, no foetus, will go down in time, call back after a month."
"Oh. Are you sure this is ok? You're pretty big for someone who isn't pregnant..."
"They don't know anything! I'm not pregnant with a *baby*, I'm pregnant with MUSCLES!"
Pete rolled his eyes.
"Hey mister! I saw that! Just for that you're going to have to fuck some more big, thick muscles into my belly!"
Pete grinned and put down the paper. He loved how she looked so big and knocked up. With a casual motion he pushed down his shorts and his cock sprang free. All it took was a waggle of his eyebrows and she was lowering herself into his shaft, cooing and starting up a surprisingly hard rhythm as she rode him.
"Cum in me! Make my big belly huge! Give me more MUSCLE!"
He would have replied, but she crammed a nipple in his mouth and held his head in place as she fucked him harder and harder. He was harder than he had ever been in that moment, but was nothing compared to receiving the first squirt of milk into his mouth.
It felt like it went straight to his balls and he groaned as he pulled her down, holding her in place as he emptied himself. It seemed to go on for ever and through it all Pete's blood felt like it was fizzing as shot after shot pounded against her cervix.
He swore he could almost feel her belly swelling against him as he came and the sensation kept him so hard that he barely noticed when she started riding him forcefully again, her lithe arms wrapped around his neck.
/////
Nurses had come and gone, doctors too, but nobody could explain Jeanie to Pete, or even to themselves.
Her belly was enormous, far bigger even than Octomom, and her sex drive was through the roof. Pete's arms were burning as he railed her, his arms hooked under her knees as they bucked and thrust back at each other, her face flushed and sweaty as she came again. The pressure on his cock was immense as her hungry, well-practiced pussy milked him over and over again.
It wasn't surprising to him really, it was only natural for muscles to get stronger after exercise, even internal ones... And Jeanie had been "exercising" a whole lot.
He jammed his hips forward as he came inside her, his heavy balls throbbing as he filled her for what must have been the two hundredth time since this whole pregnancy thing had started. He groaned in lust as he felt her belly swell against him.
Then he groaned as her pussy kicked into high gear and he found himself milked into orgasm once more.
And again.
Through his shuddering, jerking orgasms he could see Jeanie's eyes rolled back in ecstasy as she screamed and rubbed her growing belly, her huge tits jetting milk all over when she wasn't desperately cramming her nipples into her mouth.
/////