As Nick fucks you like the wild beast he is, you barely feel the changes spreading throughout your body. Your quivering sex is providing you more sensory input than you can handle. Nick is thrusting into you nonstop, and your tight canine pussy feels every inch of his shaft.
You try to protest a while longer, but Nick doesn't seem to care. In fact, you think the thought of making his best friend into his bitch is turning him on, as he swells even larger inside you. Your protests don't last long, however, as an animal muzzle pushes out of your face, and your tongue lolls out of your mouth. Oh, you can still talk - if you weren't too much of a bitch in heat to do anything but moan.
As the joints in your knees invert themselves, you fall to the ground and reflexively land on all fours. Fur creeps all over your body, a shining silver, and a tail grows behind you. As your claws grow out, you use them to dig into the ground, to try and anchor yourself against Nick's furious humping.
Your don't even notice your cock and balls disappearing, but you do feel your breasts grow slightly as you fondle your nipples. Soon you find your new sets of nipples running down your torso, and you tweak them all in turn, each one providing fiery stimulation.
As your face finishes its transformation into a she-wolf's visage, Nick must somehow sense that you are complete. His bitch ready, he slams his knot in deeper than you thought it could ever go and pumps you full of his seed.
He howls his conquest, and you feel your loins spasm uncontrollably as your body shakes with ecstasy. You remain there, panting for a while longing, before Nick gives your ear a nip and dismounts. He looks at the cum dripping out of your cunt with approval as you stand up on two legs.
You cannot be angry at Nick for doing this to you, the wolf instincts have shunted your human mind aside. While still there, the werewolf in you dominates it, and you feel the need to hunt. You can tell your mate feels the same way, and perhaps you will couple again after sharing a kill. The night, after all, is still young.