You can't do this until such time when she sincerelycomes to you, contrite and remorseful, and either begs you to take her back or asks "What do I need to do?"
If and when she does that, tell her "I'm afraid it's not that easy anymore," and that you have some thinking to do, and that you'll get back with her in a few days.
Then come here and we can help you with it.
You need to do all of this in the right order, at the right time, and the right body language and tone.
When in doubt, just listen to her, then say "I need time to think about that" and get back here for direction....
"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