Brittany goes straight to her boyfriend's apartment

By about midnight, Brittany made it to Derek's apartment. The lights were off and he was likely fast asleep. Letting herself in quietly, she stripped and crawled into bed, butt first and naked. She was already super horny and needed a good fuck, but couldn't afford to scare him away with her pseudo swollen belly and the secret within...

Spooning her naked ass up to Derek, she started grinding her hips into his crotch. He reached over and, still half asleep, began kneeding her enlarged breasts... The result she desired was taking effect, judging by the rod pushing up against her pussy.

"Whoa.... what... how are your boobs bigger?"

Not replying, Brittany reached back and fished his hard cock out of the fly in his shorts. Derek's hormonal instincts kicked in and he bucked his hips forward. Plunging his cock into her sopping wet pussy. The sensation was so different than the months of sex he'd had with her or anyone. He grunted and pushed harder. It was so tight, and wet and hot... and it felt like her pussy lips were moving. Derek didn’t know or care why everything was different.

Sinking his cock further he hit something.... hard... that blocked him. His balls started tingling... Deep in Brittany's pussy he had ran into her monster futa cock. Unaware he withdrew slightly and began to pump back in and out.

Brittany's dormant cock started to leak precum in her pussy... lubing the channel further.

Derek pushed Brittany onto her belly and rode her hard from behind. Her didn't notice her distended belly and how it pushed her ass up in the air. Trying again to bottom out, he hit her cock tip again, but lined up with the futa urethra this time. Pushing in, unawares, the second channel was even tighter. Closing his eyes as Derek continued he didn't feel the sensation of her foot wide monster pushing him away from her ass.

Fully aroused, the two foot long futa cock emerged backward from her doggie style position. Derek continued to pump until he looked down. Screaming as they both came he saw that he'd been fucking a giant cock. His cum dumped inside her... and her infected return sprayed all over his abdomen. The infection had started to take hold, and worse yet, he couldnt withdraw. Brittany had a hold on him. From her face down postion, she turned her head and looked at him over her shoulder. Smiling she said, "Welcome to your new body, I hope you love it."