Mark's mom waits some moments till your knot softens up a bit, then she tugs your cock out of Helen's cunt. Your semen runs out of the bitch's hot tunnel and you're immediately intoxicated by a whole new array of smells.
"Stay," she commands the sheperd bitch to keep where she is as Mark's mom grips you by your collar and then drags you into the house. You don't have any willpower left to resist her as your whole mind is clouded with Helen's sweet smell. And while you're being dragged into the house's stuffed basement, your keen nose starts to smell something that's at least as arousing as the bitch outside: Mark's mom is getting aroused, too!
Mark's mom (slowly your mind whispers to you that her name is Darleen) lets go of your collar in front of the big couch you wanted to crash for the night only some minutes ago.
You feel drowsy and it's hard for you to think straight. You can't tell if your body has transformed further or if it has stopped in the middle of the shapeshift, but you can clearly say that you don't feel much like a human at all anymore. You feel like your new canine cock is your new center of strenght and life and it's whispering in your head all the time.
Darleen sits down on the couch and takes off your collar.
You just slump down onto the floor, panting slowly, your arousal still as powerful as before. But somthing keeps you down on the ground in front of this human female, someting like an aura of command, as if you'd accepted Darleen as your alpha in the first moment you encountered her.
"This is weird," Darleen say more to herself then adressed to you as she examines the black leather collar.
"I found this in your car, Cal," she says, now looking down on you, "and somehow all this, your transformation and all, don't freak me out. When I took this collar some minutes ago, it told me many things."
Then she cuts out some moments, slowly putting the leather collar around her neck and locking it into place. She's smiling.
"It told me about what I could be when I accept it's powers. I did'nt need a single heartbeat to think about it. I really do hate my job, my life, my family and everything. It bugs me out to life a normal, suburban life. Screw it all, I want to be...," her eyes grow wide as they change colour and fur starts to push it's way out of her police uniform.
Slowly you get up on all fours, a position you get used to more and more. You feel the moist tip of your fully exposed cock touching your thinly furred stomach when you lift your head up to Darleen's crotch area. The human female is just experiencing the first stages of her very own transformation and shreds her cothes with her newly grown claws one by one. As she gets rid of her trousers and slip, the scent of her growing arousal, smelling like part human and part dog bitch, hits you right in your face.
"Collar... told... me," Darleen barks in mid-transformation, "that I would be the alpha of... pack of dogs... transformed humans... fully submissive... infectious..."
Her body is shaking and her muscles are warping into new forms.
Your transformation starts to continue, too, and soon both of you have been shapeshifted into dogs: you a german sheperd, Darleen a massive black labrador.
Her aroused smell drives you crazy as you dance around your new alpha bitch...