CPS HELP UPDATE

A few days ago I posted about my issue with CPS. I am now writing because 1, they haven't been back since, they did contact my SO and obviously have to meet with him before they can close the case (standard procedure). BUT DD informed us and the worker that while she was over at nana's, nana told her daddy and I are going to jail and she will be getting taken away. DD told us nana put something on her butt and took a photograph. The worker has not told me of said photo so I really don't think there is one and as I previously stated, there wasn't a mark to begin with. But I am also 7 months pregnant. I'm a SAHM, my house is very well kept, DD literally goes to dance classes once a week and summer camp every morning. Nana also told my daughter, "I don't want the baby, but I want you. But i don't want your mom to have this stupid baby either." I know for a fact this woman was the one that called CPS as she told dd and was on the phone with my SO screaming and told him even tho they cannot disclose that information to me. So I am wondering if there is anything I can do to penalize this woman after everything is said and done. We are completely cutting her off and she will no longer have a relationship with DD or the baby on the way. But I'm worried that this will turn into a reoccurring thing or she will try for grandparent rights. For example, once this blows over and she wants to demand our daughter over to her home again and we say no or just flat out ignore her, what if she calls CPS and makes more allegations and lies to try and get her way? I don't have anything to hide and I don't care. I'd deal with them if I needed to, but being pregnant I really don't want to nor should I have to. And I honestly am tired of this woman thinking she can use me as a doormat just because she hates me. Does anyone have any experience with someone wrongfully calling CPS on them? I've read a cease and desist could be an option. I'd press harassment charges if I could. I'm just tired of this woman and this is something I will not let go of. There are children out there that actually need help and are actually being abused. My daughter has been so anxious and upset since all of this because she thought we were literally going to jail and she was getting taken. The emotional damage this woman has selfishly caused to my family is disgusting. To say things like this to an almost 6 year old is beyond me.

I have also thought about private messaging this woman and letting her know what I think about her. But I know it's literally useless, it won't help anything & I'll probably end up even more frustrated than I already am. I guess I'm stuck between just fully letting this go and washing my hands with her & letting karma do it's job or getting the last word. I'm not a person that let's people treat me like this so it's hard to sit back and say f it, don't stress. And I also don't want her to think she can do stuff like this and get away with it. She is always calling CPS on everyone. She's done it to my SO's siblings, my SO's father and many other people. Everything always goes unfounded, but it's just the fact that she keeps doing it and getting away with it. And she thinks she can control us. Makes me sick to my stomach to feel like my home and my children are being manipulated by someone as toxic as her.