Do not make an ultimaitum, it will not work! You cannot make someone else value you, trust me on that one. Let her do whatever she wants and the sooner you can behave as if it is her loss, maybe just mayyyybe she will believe it. Or you can do what I did and pursue, reason, chase, beg, unconditionally love, and be tossed right into the garbage can.
The absolute soonest you can show you will not tolerate disrespect is the best course of action. The legal stuff is less of an emergency and needs more planning.
T:11 M:10 K: D5, S7 BD: 9/1/20 WW continues to break up and recon with OM. I paid last fees and pushed the D 5/3/2021 Default Dissolution granted 8/5/21. Glad my D was not busted.