As someone who has personally been there, I can say that revenge is fine as long as you move on from it quickly. Too many people keep themselves stuck in revenge/hatred/rage/etc. And that’s where things go wrong.
Look, you say she’s the mother of your husband’s kids? Surely you’d be harming his children too?
Are you sure you hate the kids that much you’d be willing to harm them to get at her? Are you sure you can handle any of the possible consequences? Because every choice, every thought, every action has at least one consequence.
Bind the person she’s paid. They’re only doing it for the money, I suspect. Which makes things easier.
Then superglue her lips together (not literally, use magick ;p ). If necessary, stop the flow of money into her life so that she can’t afford to pay anyone to attack you and your family. You get the idea.
What I’m saying is, there are other ways. Be more creative and less predictable.
And I’ve always found that the best revenge is the one where you come out on top in life despite the shit that people do… be happy, be free from hatred/fear/rage, etc. Build a life you want, and enjoy it. That would upset every miserable person out there who play in the muck, so to speak. Because, deep down, they wish they could do the same thing and be where you are.
Real revenge doesn’t involve petty tit for tat shit, and keeping yourself in the vibrational sewer.