Simon casually sat on Dave's Still sleepin bag covered legs and started probing for a entrance with his now 4 inch long penis.

Dave screamed loudly as he felt a hard moist tip probe the rim of his anus.

"Noooooo!"

Dave started crying out to anyone that could hear him, someone had to hear him before...

Dave's eyes shot open and he tried to force his anus closed as Simon drove into him but he couldn't the earlier finger from Simon made it impossible to do so.

Simon sighed in pleasure and started to jutt into Dave feeling hot seed pump into Dave.

Meanwhile Dave stopped screaming and started to whimper loudly as he could feel a strange hot liquid pump into him from Simon filling him slowly.

It was about then that Dave felt the warmth continue to spread around his body.

Simon withdrew from Dave his penis still dripping white cum from it's tip.

"I've never heard of a male chipmunk having sex with a male human , it'll be interesting to see what happens..."

Simon cackled evily.

Dave tried to stand up and was shocked when he was consumed by sleeping bag, he'd shrunk to only three feet tall, the size of a chipmunk!

Dave scrambled out of the sleeping bag, apart from being three feet tall he didn't feel any different except for his ass hurting lots but that was only to be expected after being raped by a chipmunk

Dave gently rubbed his backside only for his hand to collide with a small stub

"What?"

Dave Said looking back at his butt to see a chipmunk starting to grow there.

Simon cackled evily, "You're going to be a chipmunk just like me."

Dave recoiled in horror as brown fur started to appear all over his body, firstly his normal body hair changed to a brown color before a tingly sensation grew slowly from his new fur cover his butt in chipmunk fur.

"What are you doing Simon?"

Dave Asked his normally calm voice becoming that of a scared chipmunk and with an obvious quivering fear noticeable.

"I'm not doing anything Dave this is what happens when a chipmunk and someone have sex."

Simon Explained calmly eyeing Dave as his changes progressed.

Dave grasped at his legs as the fur crawled slowly down tingling and causing Dave to moan loudly in pain as the fur continued to move to move down his legs to his feet.

But it was short lived as Dave felt a stabbing pain in his nipples, to Dave's horror his nipple started to slowly move out from his diminutive body.