Long story short, my former manager is a bigoted jerk who tries to get her subordinates fired so she has an excuse as to why she cannot do her job. She tried two years ago with me during the start of the global health crisis, but failed and I ended up with a new manager by August 2020. He left a year later and she made an attempt to become my manager again, but it failed. In fact, it resulted in her no longer being anyone's manager after an investigation in March after she fired two employees for their protected classes. The exact conclusion was she "lacked professionalism befitting of a person in her position".
Enough time has now passed that she now feels comfortable going back to her ways, I suppose. Because she was trying to blackmail me into doing her job this week. I had to tell her that it wasn't in my job description. This resulted in her accusing me of lying - even with proof. Telling her to talk to my manager seemed to marginally help, as she backed off briefly for a day or two.
However, she is now acting like she cannot do her job without running it by me every single time in a bid to get me to think FOR her. Yesterday I had to ask if she had asked the right questions for a potential client. She hadn't, of course.
I know all the reasons for it - including the fact I started the investigation into her. But how to I politely tell her to stop being petty?