How to prevent someone exposing my murder scheme?

I got drunk at a feast and divulged a murder secret to my neice. I’m on very good terms with her and even know 2 weak hook secrets on her but she keeps exposing me no matter what I do.

I have saves enabled so I keep reloading to try to sway her and send her gifts but it doesn’t seem to stop the exposure. Is there anything I can do to prevent this?
Obviously I could murder her or imprison her but I’d rather let her continue to rule her county if possible.