When you leave the Hag's workshop, you speak to Mayrina and you can raise Connor. You then have the choice to keep the wand yourself, or hand it over to her.
Killing her brothers doesn't mean she dislikes you, they die to Ethel's traps in the swamp if you do not kill them.
The main thing with Mayrina is either snapping the wand in half, raising Connor and giving her the wand, or raising Connor and keeping the wand yourself.
