What you do is tell him nothing.

Practice saying "I am still reading it and sorting it all out. I am slow. Sorry."

Or you could allow yourself to express the most kindest form of "Go F*** yourself, I don't want to talk to you about this right now, and I don't have to".

Lawyer up to the max!

If his math or his thinking has changed, it is no longer amiable. If he is having to explain to you that he is being generous, then he knows he is doing you over big time. You would know generous if you read it.

No one cares what his L thinks. He's not on your Christmas card list!!! You don't agree to anything or argue anything. Hold off telling him you are "racing" to L-ville until it is done, and then listen to advice of L on how to proceed.

Telling him you are going to L is information he does not need or deserve to know. It is sure to set him off, which you don't need. He probably thinks he is being fair and controlling his exit strategy. Sounds like he may need a lesson in speeeelling "fair".

Take care and breath deep. Do whatever helps you relax. Soak in a tub. Watch a funny movie. Make a VooDoo doll. Maybe one glass of wine ... not too much self medicating now. You need composure and a show strength in the home if possible. But not for the benefit of others. For your own benefit. Don't show your cards. Protect your backside. Look no further than your own heart for strength and inner peace. It is there.

Making a stand now is the first step toward living the better life. Doing that should be at the top of your ToDo list. Take care.