You don't have to agree to any of this and she can't do anything without your consent. That much I know. She can't do a refi, take out an equity loan, nothing without your consent.
So talk to your lawyer. Take a deep breath. And don't worry about her arbitrary deadlines. Obviously this will upset her. Listen and validate.
What I can tell you is that you say way too much. And on Sunday no WAY should you have restarted the conversation.
One piece of final advice. Being nice will get you further than playing hardball. "We are going here, and here, watching fireworks, dropping brother off and then driving home." Use common courtesy. Technically you are right, it is none of her business. However, you should let the mother of a 1 year-old know what the plans are.
And the lack of calling son during the week, to me as a fellow father, is inexcusable. I would have called every day. Or at least texted her to ask how he was doing. Can't say your way of handling it was wrong, but it isn't how I would have approached it.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018