"Oh, I know the perfect stud for you," she whispered in your ear. "You're going to be the envy of all the mares here. He's new and hasn't gotten a chance to be used as a stud yet, I think you'll be the perfect first mare for him, he's been very eager to mount and sire a foal in his first mare. There's no one else in the Stable that would be better suited than you, so let me introduce you to him."
She lead you out of the stall and through the Stable and into a back room where she secured you so you wouldn't be able to escape easily. "I'll be right back with your handsome stud."
She walked out and you were left there with your thoughts. The fire in your loins was just growing stronger, you needed to be mated with now, you didn't care that he was a horse. You wanted this stallion inside you as badly as he probably wanted to be inside you, you wanted to bear his foals and for a moment the fact that you were human slipped your mind.
The woman came back in pulling along a large brown stallion. You pushed your tail to the side and looked back as he pushed his muzzle up against your vagina and took a long breath, smelling your pheromones as he did. You saw his shaft slipping out of its home in his sheath and your eyes went wide, he was huge, even bigger than Harry had been.
"Handsome isn't he? He came out really well," the zoo attendant said as she stroked your mane a little. "What a shame really, we had hoped to get another mare from her when she first came here awhile back. But instead we got this handsome stud and she's been here on and off for awhile, and brought us a brand new mare. I think that's something that makes her worthy of staying in the stables with her mare."
Wait, what was she talking about? The stallion had used to be a human woman? You whinnied as you felt the stallion's tongue licking your vagina.
"That's right Jesse, she's all yours," the attendant said with a smile. "Your old boyfriend is now a mare for your breeding. Take her and you will never have to be human again."
Jesse backed away from you and paused a moment.