First of all, breathe. Stay calm. Get a grip of the situation.
You know that OW is going to cause you problems for sure. She probably instigated husband to move near you. No sane OW would want to live so close to husband's ex.
So now you need to take control of the situation, knowing that OW will come after you.
- Talk to your superior at work. Inform them about your situation. Show them the email messages etc. Tell them that you are afraid that she will come and cause trouble. Then they will be prepared to deal with her, and when she shows up, your colleagues and security already know what the situation is. You don't waste precious time telling them the back story. They will alert you if she comes snooping.
.2. tell some of your neighbours about the situation.When crazy OW comes to your house and go nuts, they will know what is happening and can call the police and be witnesses to whats happening. Again, they will know back story.
.3. Go to the police and tell them you are reaally really scared. Print everything out and give it to them.Although they can do nothing, the important thing is that you get some kind of report number, and they have the information. Again, if something happens, you can call the police and quote your report number, and they will know.
.4. Ask to see the community police officer and talk to them, and also ask for police to come to your place and check out if it is secure e.g. places people can break in and enter. This shows how scared you are, and you are.
- Is there a community free legal advice place you can go to get advice ?
I know people say get a restraining order but that involves time and cost.
First, line up all your ducks in a row....... and carry a personal alarm. If she approaches you in the supermarket or your home then just press the screeching alarm. It should scare her off if she is really wacko ....
I think she is delusional and thinks that she is the wife and you were the OW stopping her from behind with your ex.
YOU CONTROL THE NARRATIVE BEFORE OW ARRIVES......