"My first task is that I need to turn into a cow and produce milk from my udder."
Dan wasn't too pleased by the sound of that. "Eww! That's nasty. So I have to... er... milk... you?"
"No, much worse, you have to turn into a calf and drink it."
"Aaaa! No way, sis, that's just sick. NO way."
"Either you're an anthro-calf or a cooked pig. Your choice."
He sighed. "Go for it."
She read a spell from her book and waved her wand around a bit. She changed first. "I'd advise you take off your clothes," she said, as she stripped off to allow her new udder to grow.
"I don't wanna get naked in front of you," Dan said, eyebrows raised.
"Daniel, soon you'll be suckling my teats, I really don't think that kind of thing matters anymore."
He reluctantly took off his clothes, and to his surprise, found he now had brown fur, just like Kat, who was now a complete anthro-cow. He watched in awe as his hands turned to hooves and horns grew out of his bovine head. He even had a little tail.
He stood, admiring his new bovine body, but Kat interupted. "Come on, get sucking, I'm bursting here."
"As sick as this is, it doesn't seem so bad now, maybe I could get used to being a cow."
"If you've ever seen a slaughterhouse you'd think otherwise. Anyway, come on, we've got plenty to do!"
"How will the ajudicators know you've done this? I mean, we're the only ones here."
"They're watching us now, that's why I've been so uptight about doing this quickly. NOW SUCK MY UDDER!"