you know that there's no reversing the changes once they're done.
you reason with yourself that you'll stop very soon, you'll just enjoy a few more sips of her warm, delicious milk, and the new changes will be easy to hide anyway. you'll keep your hood up to cover those big, pointed ears, and you're pretty sure you still have a pack of covid masks to cover your new muzzle.
Uh oh... walking on your new digitigrade feet might pose a problem, but you'll get used to it. girls walk in heels all the time right? it's kinda the same thing. wearing shoes is out of the question now, though...
wait... is that a tail?? well... maybe you can... ummm...
she's done something to her breast milk, enchanted it with some kind of witchy magic or something, to make it even more delicious and creamy than usual. you pleadingly grab her waist as you press your face deeper into her soft, lifegiving breast, your cheeks puckering with each scrumptious suckle. you can barely feel the soft prickle of fur growing all over your outstretched muzzle, or the frantic flicking of your new tail wrestling out of your sweatpants.
she chuckles with delight each time a new change happens to your body, and coyly reminds you that you're only minutes away from being a kitty forever; you know this, and yet, you can't stop suckling...