Fulfill an old geas (if your character is male)

Amina takes off the pendant and hands it to you. "If you want to help me," she says, "put this on and repeat what you just said."

"Okay," you say doubtfully. That doesn't sound very helpful, but if it'll calm the girl down... You put on the pendant and say “I’ll be happy to help if it’s within my power.”

“No, before that,” Amina says.

“I wish I could help you more, but I don’t have any clothes I can give you.”

“Perfect...” the girl says, “Mistress.”

“Wait,” you say, “Mistress?”

“I'm a genie,” Amina says, “and now I serve you. Your wish is granted, you shall help me obtain what I most desire.”

You feel strange... everything's shifting... “What did you do to me?” you ask in a high-pitched voice.

"Well," Amina says, "you may have heard stories about how genies like to trick humans by twisting around their wishes." You nod. “To ensure my loyalty, one of my previous mistresses wished that my greatest joy in life would come from ensuring that my mistress seduces another woman, and that I would feel the joy they felt in the act of carnal union.”

“But I'm a guy...” you say.

“Not anymore,” Amina replies. “At any rate, because of that geas I cannot be truly happy with a male master. But you seemed so kind, I thought serving you wouldn't be so bad if we could just make one leetle change.”

“Little?” you bellow -- though it comes out rather like a loud squeak. “You call these little?” you add, grabbing at your breasts. You gasp in shock -- that wasn't supposed to feel good, but it did. “These things are so sensitive...”

“I'd call them just right,” Amina replies. “Since I share your pleasure I of course want to maximize that pleasure. Anyway, I've wanted to do this to a master for a long time, but you're the first to give me the opportunity.” Her voice shifts, taking on a pleading quality. “I can make you very happy now, if you'll just let me. Please, Mistress?”