She is locked in this form

Hot love explodes into Luna’s furry little cunny, and she squeals like the dirty rabbit she is, stomping her hind leg against the sticky floor in a spastic orgasm. As the hot silver cum washes through her, it seeps into her body and makes her insides glow with a pale light. Even in the thrill of this horny moment, Luna knows what has happened: her old body is gone, and she will neger be anything other than a little white rabbit ever again.

With her humanity erased, Luna’s magic slips away too, and the Patronus fades away behind her. Luna the rabbit lies trembling on the floor, squirting as she feels the certainty that her old life is no more.