Danielle and Brandon stood there, terrified and confused. Finally, Danielle spoke. "You're not going to...to...to..." she said, trembling, unable to finish.
"Force you to have sex?" Kat finished. "Hell no. I could, but where's the fun in that? That'd just be me forcing something I'd find funny to happen."
"Then...what?" Brandon queried.
Kat laughed. "I'm glad you asked. See, I can tell that you two really are in love with each other. And although you wouldn't be able to come to terms with that right now, having just switched genders, I think you would eventually. As I mentioned, although I could force you two to get it over with, it'd be much more entertaining if it happened on its own. So I made sure that you, Danielle, don't have a heat cycle the way animals do. You're just always fertile, like a human. Both of you have complete free will, although you do have instincts there to guide you when you let them. I don't want this to happen without you two making it happen. I'm just going to ensure that you remain like this long enough to do it yourselves."
"Th-thanks, I g-guess," Danielle said. "But Mom won't let you do this, will she?"
Kat cackled evilly again. "Mom isn't going to find out. See, I've just perfected some spells for time dilation and interdimensional teleportation. I'm going to send you somewhere where you'll have to stick together to survive, and I'm going to leave you there long enough for fun stuff to happen. Thanks to the 1:1,000,000 time dilation, even if I left you there for seventy years, it wouldn't take much more than a half-hour here. Hell, given that she and Dad are gone for the evening, I could leave you there for multiple lifetimes and just reincarnate you in different bodies upon your 'death' so nobody there suspects. And when I've had my fun, you'll come back here, and return to normal, and Mom won't be the wiser. And if either of you tell her, you'll get much worse than this, capisce?"
Danielle and Brandon stood there, slack-jawed. "No," Danielle yelped, "please-"
But Kat laughed again and flicked her wand at them once more, and the world went black.