Lilly rushed to the bathroom sink and dowsed her face with hot water, not being careful and getting a massive glob of sweet dog cum in her mouth. She was about to puke but suddenly found that her gag reflex had been rendered useless. The cum... the DOG'S cum... It's the single most amazing thing she's ever tasted and her body is craving for more. She wastes no time in cleaning the rest of it off her face and hands, leaving no trace of it on her body. "M- more I NEED more!" She then burst out the door and practically sprinted back to where she came from, but she failed to notice that her mouth had pushed out some. And that her clit had grown a couple inches and turned red.
She passed Sarah in the hallway and she was spouting something like "what was all that screaming?" and "Holy shit what happened to your face!?" But Lilly didn't care a pushed past her into the kennel room and found the dog right where she left it but it was sucking on its massive dog cock and swallowing everything. It looked really bloated.
So Lilly made the executive decision that she needed it more and ripped the dogs muzzle off of its cock with a massive and wet pop/shlick sound and stuffed it into her own gaping maw. Something was off about the dog it wasn't making any noise and it wasn't moving at all. But of course Lilly didn't care and kept on sucking on his massive and tasty doggy cock until he finally burst into her mouth a lot, like, A LOT, a lot.
So much so that she was completely bloated within the minute. She then finally let go and only then does she begin to notice that there's fur sprouting everywhere on her body, her hands are now paws, and there is a massive (and tasty) dog cock with massive and unending balls right above her now canine pussy. Oh, and that Sarah had witnessed about half of what just went down.
Sarah watched in disgust as both her friend and the dog she found bend their heads down, put their massive dog cocks into their muzzles, and cum nonstop. The last shred of humanity slipping from Lilly's mind as she joins her doggy brother in worshipping their own tasty cocks, FOREVER.
Sarah (currently lying in a puddle of her own puke) catches a whiff of the pure musk the both of them are giving off and pukes again. Because of all the stimulation, she passes out and probably won't wake up for a couple of hours