Kink: transformation
Just want to see a girl magically GROW. Taller, more muscular, fatter. Bigger boobs, wider butt. Cock growth is a plus but not necessary.
Wanna see her grow more bestial too. Like a horse. Hear her moans of joy turn into animalistic calls. See the tail grow. Hooves or paws. Face pushing into muzzle. Mane, manes are great.
Just let her feel stronger, faster, more liberated, more fire in her veins, all the raw energy coursing through her veins as she becomes something more.