I don't know all the details, but it sounds to me like you are on thin ice here ... not only is this woman apparently unstable and vindictive ... but you have a dog that could possibly bite her if given the chance. (Do not put it past her to intentionally stick her hand in and get bitten!)
That is actually how I found out Roxy will (possibly) do that. Supposedly, she stuck her bare foot under the fence and Roxy bit it. Roxy supposedly wouldn't let go. A second time, she says she stuck her hand through a hole and Roxy "mauled" it. Both times I talk to her the day of the supposed incidents, and there wern't any marks what so ever. Not even like imprints if it was a lite nip. Nothing. I asked her why she would put her limbs through my fence, and she said "To see if she'd bite me." So, that was when I built the double fence so that my dogs can't come within 3 feet of the fenceline between her yard and mine. That was last winter.

Then, when she stole my dogs and dumped them off a few months ago, I quit putting them in the yard unattended what so ever.