What to do about husbands baby momma

I attached a bunch of screenshots to get the jist of everything, but lately my husbands baby momma has been posting all over twitter that he’s a cheater and she hates me and that him and I are nothing but trash. I’ve asked my husband multiple time if he is cheating on me, why she would be saying that, and even went through his phone. (Back story, my husband and I were in an open relationship and both had tinder to try and meet new people so he thinks she saw him on tinder and that is why she’s calling him a cheater) my husband and I also went through a serious bump in our relationship where I was about to leave him. We fought and we cried and he begged me not to leave him and we have been mending our relationship since and just been focusing on us. He said that if he was cheating on me he would have never cried and begged me to stay with him the way he did. And which I beleive him completely. But when people send me these screenshots I instantly worry that he’s cheating on me with her and Er all insecure and accuse him of cheating with her.. he said it hurts him and makes him upset that I think he would ever cheat on me, let alone with her because he despises her completely, but is civil for their daughter. I don’t know what to do ladies because he won’t tell her to quit her shit because when he has told her to stop before, she never listens to him and just does what she wants. I don’t know how much more of her shit I can put up with because she has made me even want to kill myself before, back when I first got together with my husband. She harassed me that bad. I had gotten approved for a harassment restraining order against her a couple years ago but never ended up paying for it as it was close to $400. Should I try and get the restraining order still? Or what should I do? Because I am lost completely and I just want her to stop trying to ruin my marriage and my life with my husband all because he doesn’t want her. I need advice so badly😩 anything will help ladies!!