Katie was about to get away when john gave her another lustful lick, sending her over the edge. She fell forward with her ass facing John and presented her newly formed cookie. Not needing anymore goading, John mounted his bitch. Katie once again imagined herself as a bitch being bred, but she knew that soon she wouldn't have to imagine.
Slamming his cock hard into Katie, they were once again knotted. Katie put her hand on her stomach and felt as her womb became even more bloated. It seemed as though it would never stop but after 2 hours of being knotted and cumming from both lovers, they could finally come apart.
Katie was so exhausted that she fell asleep right there on the living room floor. But John wasn't, in fact, he felt more invigorated than before and could tell he had more doggy sperm to give; Like a lot more, so much so that he mounted the sleeping katie and continued (he began to wonder if his cock was this big before).
After a good night sleep katie awoke to several unfamiliar sights: First of all, there was cum EVERYWHERE and she was soaked in it. Second, her hands were hairier than before and when she turned them over she definitely had pads. Third and finally, her face was jutting out some. Not entirely like a dogs but it was only a matter of time.
She stood up immediately and felt as John's cock slid out (luckily he was out cold) and almost fell over due to the fact that she wasn't standing on feet anymore. "Holy shit my fucking legs!" All this change had her overwhelmed and she began to feel queasy. So she steadily walked to the bathroom in an attempt to prevent any more messes in the house.but it was too much, She leaned against the bathroom door and hurled for a good 10 seconds before taking a breather.
Katie then noticed that most of what came up was John's seed, she could taste it in her mouth. It seems that, in katies sleep, John filled more than just her pussy. Disgusted, she opened the bathroom door and locked it behind her so that she couldn't get any interruptions. She then forced herself to upchuck any remaining cum so that she could feel a little less bloated. When she was done she tried to flush it all down the toilet but it just clogged up.
She then felt that she needed to clean up and took a nice long shower, letting most of John's cum out of her pussy (which also clogged the drain). As she stepped out of the shower the reality of her situation hit her and she rushed to the mirror to look at the damage. "I look like a fucking freak!" Her legs from her knees down were that of a dogs. The fur around her new equipment had spread, reaching her belly button and what was once the formings of a tail were fully realized. Her arms had began to grow fur and her face had definitely pushed out some.
At first she was horrified by what she was becoming, but then she realized that this is what she had fantasized about for so long; A bitch being bred. The thought stayed in her mind and she couldn't get rid of it. She began to play with herself when she heard a scratching at the bathroom door.
John had woken up and followed his and her scent to the bathroom, he was really pent up. His balls dragged heavily on the floor and his cock stood at constant attention. Katie could hear him whine and bark from the other side and...