THY = YOUR
THINE = YOURS
but that's not exactly correct . . . it's slippery. "Your" could be either "thy" or "thine," but so could "yours." I think it's contextual.
Anyway -- I found the concept to be fairly fresh, and aside from the little language problem, I liked the story. It became obvious that something was going to turn out really badly for at least one of the characters when Jake started addressing his wife by the wrong name. (I've never done that, but I'm pretty sure it means Big Trouble.

I honestly wasn't expecting the --unusual development -- to be the work of the evil sorcerer, who was clearly also a brilliant strategist.
Good story!