How to Stop Contact by Somebody Who Thinks You Had an Affair With Her Spouse

My question involves criminal law for the state of: TX

Over a year ago I was accused of having an affair with a married man that I did volunteer work with. I am also married and this man and I were only friends, although we did talk and text message often regarding our volunteer work and our lives. After his wife made the accusation, my husband and I met with her to assure her it wasn't true but she didn't believe it. He left our volunteer organization after she refused to stop contacting me about this "affair." She had threatened to hurt herself and called me out on Facebook until I blocked both of them. It's been over a year and I haven't heard from her until two weeks ago. Even thought I thought I had blocked her phone number, she texted and called me asking to meet with me and my husband. When I realized she was still insistent that I had an affair with her husband, I refused and told her to leave me alone. She threatened to contact my employer and my family members to tell them all what I had supposedly done. She has not threatened violence against me but I am concerned that it could escalate to that point. Her husband was right there with her and did nothing to stop her behavior so he is no help (there are signs she is emotionally abusive toward him) and she clearly is not going to let this go. Today I got a strange phone call at 7 am from an unknown number (I let it go to voicemail) from someone claiming to be a person from my husband's past asking to speak with him to catch up. She said she was from another state (coincidentally where my husband's family is from) and she mentioned she was a friend of this married man. The number was from a local area code so clearly not out of state and the mention of the other man was a red flag. My husband is aware of the situation and doesn't believe her but I am worried about her escalating behavior, especially because I have small children and I work in a somewhat high profile job.

Is there anything I can do? Should I call the police? Hire a lawyer? I looked up getting a restraining order but it only mentions family or dating relationships, and this is neither. I don't want her causing trouble for me with my job or my volunteer work and I don't want to cause any more trouble for her poor husband who has to live with her but I want her to leave me alone.
Any advice?

I don't see grounds for a restraining order, but it may be effective to have an attorney write a simple "cease and desist" letter. Yes, it'll cost you a few bucks. No, it won't carry any legal weight. But it might do the trick.

I disagree that a letter would help at this point. Because this person is obviously motivated by the simple possibility of getting something she wants. What she is wanting is attention from you, any kind of attention from you, which will serve to reinforce her crazy beliefs. And in that case, NO attention from you, including contact from your attorney, is the best policy. It wouldn't scare her to get a letter from an attorney, it would excite her. ("Where there's smoke there is fire!" and "The feud is back on!")

Once you have become their target, to use a really professional sounding term here, crazy people do not suddenly just decide to stop bothering you and go away. She's checking to make sure her old game isn't going to become available to her again, she'll probably do this periodically for the rest of her life. And remember, intermittent reinforcement is the strongest kind, and the best way to perpetuate this behavior from her. You need to go through the whole hanging up, blocking, ignoring, not responding thing again, patiently. And being sure to give her as little contact and as little attention as is possible. If somebody from the past wants to get hold of your husband, let them write him a letter. Let HIM ignore it.

Of course, you will also have alarm systems in your house, use careful self protective behaviors, check your bank and other accounts carefully, and use every possible means to safeguard yourself and your family from her. If there is any physical approach, that would be the time for the restraining orders, but really, phone calls and facebook contacts (which incidentally, I'd have the utmost in security and privacy settings if I continued to use public social media of this type, so she can't be reading about you regularly) are just that, social media contacts.

Do not worry excessively about her "poor" husband, he's in his world by his own choice, you have no responsibility for it. And as far as her "going to your employers" or the local media (like they'd be interested!)etc., it hasn't happened yet, probably never will. It's just a threat. True, it might be embarrassing, but it wouldn't be the first time, and it wouldn't have much effect if you are otherwise doing things right and trying to move on with your life. People like this get well known by the community eventually, and don't end up with any credibility. Stop worrying, be proactive, and DO NOT give her any reinforcement.