I thought that he slept in her room and she didn't know that he was there.
Killing her would be good too.
If Bradley's mum saw him leaving and thought "How cute, my girl is frakking nerd" only to later bring it up over breakfast...
Norma owes the deputy.
An eye for an eye.
Of course if it comes down to returning the slave to her master or putting the little girl out of her misery, and when is she going to get it that he likes it when women are tied up and can't escape, it's just hat her leash is a little more metaphorical, but he still knows how to tug at the choke grip.