After you made your choice, Christine turned away from you, walked over to rusty, and gave him a firm slap on the back. "She's all yours!" she says. Rusty stumbled forward, not entirely used to be standing on his new paw feet. He puts his hands on your shoulders, the rough pads scratching your bare skin.
"Not to make this weird or anything," he says timidly. "but I've kinda wanted to do this for a while now." You kiss him right as he finishes. The pheromones have been driving you crazy. His tongue is flat and long and you gag slightly as it fills your mouth.
As you break the kiss, you say through your sharpening teeth. "Just fuck me already." Rusty lowers you to the ground. He lines up his leaking rod, and plunges the tip inside. The pack howls in celebration. Couples kiss. Sarah drops down onto all fours and the boy from her class that she doggified mounts her. Rusty starts to thrust more and more. It's clear he is making sure he doesn't hurt you. You gaze up into his eyes and start to pant. Your nose turns black and your tongue extends and hangs over your sharp teeth. You cup your breasts with your rough paw hands as two rows of nipples appear down your belly. You let out a whine of pain and Rusty stops. "My feet!" you shout. You have neglected to remove your shoes, and now they are straining from your growing paws. A nearby bitch crawls on all fours over and uses her claws to peel the sole from the toe. Your paws burst free, covered in brown fur. Seems like you are becoming a German shepherd like Rusty.
As you near climax, you give Rusty the signal, and he pushes his knot into you. You both howl in pleasure, and are joined by the rest of your new pack.