You may look into possibly getting a stalking protective order against her. Also, depending on the circumstances of the divorce, there may be grounds for filing contempt against her if she is violating court orders re: not harassing her now ex-husband, his family, etc.. In addition, there are criminal statutes re: stalking, harassing phone calls (ocga 16-11-39.1).
Where is your husband and his lawyer in all this? He can likely file a contempt if the divorce is being violated, and other relief. You might also be able to file a stalking order as well.
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Under the facts provided, I know this is your husband and you are trying to do what you think is right to help him, however, I would suggest you step back and let him deal with her. They have children together so there will be some contact between them. There is no need for you to have contact with her. He has several options including the ones mentioned in the other posts. Let your husband deal with her.
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