Call the cops and call a good lawyer. That's what they are there for.

There is no reason for you to put up with such harassment and it's high time someone shut her down.

You should have done this when she cut the limbs off the tree -- having the workers go onto your property made them trespassers and her the instigator of the trespass.

Her ex-husband should be arrested for on, at the very least, a health code violation.

Also, she needs help. She obviously have a number of unresolved "issues."

Do it now or the bullying will continue.