BREATHE! Follow your lawyer's advice. You can't rationalize w/someone who is emotional and off the rails. At some point, you may get the opportunity to let her know that you misheard her about the kids being in school.
For now, focus on you...it's a two step forward, one step back dance right now. You can't "assume" anything that she may do.
Continue to move forward.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.