Cow

"I want to be...a cow," said Salma.

"Okay," said John. "As my cow, you exist only to moo, get milked, and get bred. You'll waddle around the house on all fours and moo, and you'll of course be naked. Okay?"

"Want a new name," Salma droned. "As cow...my name should be...Bessie."

"You're really into this, aren't you?" John chuckled. "Well, 'Bessie', give me a little moo."

"Moo," Salma droned as though it were the most natural thing in the world.

"Good," said John. "Okay, so when at home, you'll be Bessie the cow. Anytime I say 'Sleepy Cow', you'll fall back into this trance state. When not in trance state, you'll revert back to Bessie. Got it?"

"Moo," Salma said in affirmation.

They pulled into the driveway of Brie and John's mansion, and it was time to unleash Bessie.

"Salma, strip naked."

Salma obeyed, her dress sliding off her body easily, followed by her bra and panties. She stood naked, her massive jugs out to breathe.

John snapped his fingers, and Salam vanished, replaced by Bessie the human cow.