I think it's a good thing that that happened while your hubby had company! so that's not so bad (though it could become worse, I agree.) I doubt the police can do anything until she does something...unless you post a no trespassing sign, you would have to get a TRO to stop her, and if she is a neighbor, that wouldn't be very enforceable. (and costs money)

Things happen. It's called life. I'm not minimizing how you feel about these things, I, for one, certainly understand how events affect us (especially when we are already "down."

TC and keep going.. one step in front of the other.