SIL from hell(rant with question)

I was very happy for my brother and his wife when they had their 2 little girls and I also felt bad when they couldn't have anymore but they were blessed with 2 beautiful healthy girls. It wasn't until after the second child was born that it became a living nightmare. At first it was trying to tell me how to raise my family, which I had at the time 3 boys and a girl, even though she was not doing a very good job raising her own, I would listen to her but the fact that her mother was raising the babies made me wonder why I should even listen to her. But once she realised that I was going to raise my children as I pleased, she started calling CPS on me. At first, I didn't know who it was doing this. Given that I didn't have many friends at the time and I rarely went out of the house made me who it was but I would have CPS on my door demanding and threatening me. This started in 2005. It wasn't until 2009 that I found out it was her and it was by accident because she was doped out of her mind that she let it slip it was her after she tired to say it was someone else. I actually called that person and put her in a very uncomfortable situation and when she answered me after the questions she was in complete horror that she was even referred to as the person that made the aligations. After that, when CPS showed up on my door step I just asked them "what's the complaint now?" None of the case workers were ugly towards me because they saw what was going on but they had to investigate because the aligations were so intense they were forced to investigate within 24hours of the report. After they came, every single one said that there was no grounds for the call. Dismissed the report and I was left alone. Now it is 2017... I haven't spoken to my SIL or brother in over a year but yet she can still make my life a living hell and there is absolutely nothing I can do about this at all. Apparently you can call CPS as many times as you want and since you can remain anonymous, there is nothing they can do to the person that makes the report because they have no way of tracking them. Any way, I know that sometimes people get caught making too many false reports but how many do they have to make and how much stress do they have to cause before it is stopped?!? Honestly, is there anything that I can do to get her to stop doing this to me?!? For over 10yrs my children and I have been enduring the stress and hell that this causes and I'm hoping that there is someone out there that works in CPS or knows how CPS works that can give me an idea of what I can say to my case worker to have the reporter investigated or to have less of these investigations imposed onto my family. I would think that after 10yrs of all the cases being closed due to unfounded aligations that they would stop but they don't. Any one know anything I can do or say to get this to stop?!?

EDIT: My brother is very aware of what his wife does but has no back bone to put his foot down to stop it. I know it's her because she brags about it all the time how she called and she can be a better mother than I can. Funny part, she can't even handle her own 2 kids and she wants to take on mine!!? She also has a bad health condition that has her on pain meds all the time and she hasn't had a driver's license for almost 13yrs but I'm the one that has poor parenting abilities and puts myself before my kids! I forbid my kids to go to her house because she doesn't watch the kids at all. They babysit her and take care of her. Also no license means she is not insured on the auto insurance. The list of things that this woman has that is wrong can go on. All I have ever done is bring her to doctor appointments, take care of my nieces when she couldn't, clean her house shortly after I had my last child and it was a c-section. Offered to even change my diet to help her transition into hers that she was ordered to be on(she never did the diet and her health suffers greatly for it) and I'm the one that is selfish and doesn't care about or able to care for my children. Am I wrong?!? Am I really a bad parent?? Bad person?!??