"I'd like that." you say dreamily. She kisses you once again.
"I'd hoped you'd say that, my pet." she says and rolls out of bed. She walks to her beauty table and opens the drawer. "Most men have the sense to stay away from this place, and those that don't usually end up as mice or trees, perhaps a horse or cow. It will be so nice having something other then a beast of burden or a pesky rodent." She pulls a wand out of the drawer. "Now hold still, precious." she says.
It suddenly dawns on you that she means "pet" quite literally. You panic and bolt towards the door. Again you stop in your tracks, this time rather then being bound by invisible bonds it's your own body stopping on it's own. She laughs again.
"Silly man." she says "did you forget you gave me power over you? Did you think that power was finished after you were? Let's begin." With that you turn around against your will and she points her wand at you and hits you in the chest with a bolt of magic. Instantly your chest begins to itch. You can see light tan hairs begin sprouting from it. Your hands touch the hair and you quickly realize that it's actually fur. It spreads down your chest and to your stomach and up your chest to your neck. You pull your hand away from your chest and find your knuckles curling up and fusing together. Black pads form on your palms and fur begins sprouting from between them. Small black nails sprout from the backs of your knuckles as the fur wraps around your hands, now paws and spreads up your arms, shifting the muscles and bone structure as it does so.
"Please." you plead your voice filled with panic. "Please no don't..." you stammer. She smiles wickedly.
"Don't what?" she asks with mock innocence. You try to answer but your tongue has changed shape and your teeth canines have grown out. You other teeth shift too.
"Don't tuwn m..." you try to say, but by then you nose has grown black, cold and wet and it pushes away as a muzzle grows from your face. The fur has reached up to you neck and quickly closes around your head. Your ears are covered up by the fur and disappear, but new ones quickly push out from the top of your heads and flop forward. You try to speak but only manage some strange growly sounds. The fur closes around your back and around your legs, completely encasing you.
Your legs are slender dogs legs and your arms are gone replaced by front legs. The last bit of change comes as your tail bone swells and pushes out from your rear into a big bushy tail. You hear her laugh again as you try to keep your bipedal stance, issuing more strange noises as you try to speak. You finally fail as your spine shift, driving your paws to the ground. She approaches you. Tsking as you keep trying to speak English.
"Now now, my pet, you know you can't speak that way. Speak the way a dog does, dear." she smiles.
You bark. You bark again and whine. Somehow you feel a sense of finality to the change, and a sense of permanence. With every bark you feel yourself forgetting more details of your human life. You can't think of your name, your hometown, anyone you'd known before you came here. This terrifies you, but it seems to please her.
"Good boy." she says scratching you behind the ears. "Bark all those silly unimportant memories away." You stop barking immediately, remaining absolutely silent. She tsks again. She gets on one knee and cups your head in her hands looking directly into your eyes.
"Darling. You're in a mansion out in the middle of nowhere. You have no magic to turn yourself back to a human with, and I can promise you that I never will. And once I put my collar on you you'll be magically bound to me and this mansion. In short, you're mine forever. Keeping your human memories will only sadden you. Bark them away, sweet." she says in a soothing voice. You bark. You bark again and again each one getting more and more joyful as you forget what it was you were so afraid of. She laughs and encourages you until you spin around a couple of times playfully. She fastens the collar around your neck
"I've always loved German Shepherds." she says lovingly "Come." she says and walks out of the room. You follow your new mistress tail-wagging all the way.