Please don't heal her, please don't heal her. Just kill the cunt and get done with it.
No, that's what she wants. To
really hurt and punish her, he should somehow de-power or seal her, apprehend her and lock her away in some sort of prison, and then never check in on her. Just lock her up and abandon her. Deny her the connection they have; the bond she's so attached to.
That's how you truly hurt her and make it stick.