Which ever of the above option feels the most uncomfortable to you, is most likely your best choice.
Do not fear her response.
I recently listened to Jorden Peterson talking about how important it is to learn to tell others NO. Very good skill to have during this phase.
She wanted to leave. She has left. Yet it sounds like she comes and goes as she pleases. Get legal advise and get her to stop. She needs you to give her a big dose of vitamin NO, this is not acceptable behavior. This is how she will respect you. Do everything in your power to gain her respect. She might get angry, which is always a good sign. She is still emotionally attached to you. When she is indifferent, then your probability of attracting her back goes way down. Until she respects you, she will not be attracted to you.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712