Dealing with a harassing ex-spouse can be emotionally draining. It's crucial to stop the harassment as soon as possible for the health of the family. This is especially important if there are children involved. Children learn how to handle confrontation from their parents, and how you handle your harassing ex-spouse could help them in the future.
Talk to your ex-spouse and find out what the problem is. Ask her why she is harassing you and what you can do to make her stop. There likely is a good reason, so if you find out the what the problem is, you can probably put an end to the harassment.
Explain to your ex-spouse that the harassment must stop. If he's harassing you at work, your job suffers. Harassment at home gets nosy neighbors involved. And harassment poisons any possible chance of a friendship in the future.
Tell her that you are prepared to go to the authorities if the harassment doesn't stop. No one should have to handle a harassing ex-spouse, so if she doesn't stop, get a restraining order.
Come to an agreement. It's best to end things amicably, so everyone should agree to act like an adult. If your ex-spouse agrees to stop harassing you, life can continue as normal.
Don't take the law into your own hands and threaten your harassing ex-spouse. This only fuels the fire and creates more animosity.