Sinktember day 20 - Couple (?) (Sarah and Zombie)

Sarah, (The fearless girl) time ago, find an zombie which is trapped in an deep lagoon. The zombie is way to heavy for her (also extra weight for being underwater) so she everyday personaly (murder an human and take his brain off to) feed him so he can be an happy zombie, also call him Fred. And one day, Fred's arm come off and Sarah take it like an present of they friendship.
(If you ask, why the zombie doesn't attack her? She got an "special" thing with any kind of monsters, this ones just.. feel somehow comfortable around her so, they don't attack her, and she totally love them, also isn't afraid of dying. But.. at the cost of being extremely scared of humans)