golf mom, I'll share a little something w/you...we all learned the hard way, just as you are. We all tried to have relationship conversations w/them. Don't beat yourself up over this incident...but from here on out, until you are stronger, use email as your choice of communication. Besides, you need the writen word for documentation, if you ever should need evidence of any type during your separation/divorce, as well as for a reference if you have questions later on.
You need to remind yourself over and over again, that when you are discussing business, leave the personal issues out of it. I hate to say this, but when the word divorce enters the picture, all personal chats are tabled and you have to now look at the partnershp as business. Think of it this way, a partner has broken an agreement and you, as the other partner, now need to take care of your business alone.
You will become good at dealing w/your h once you learn to accept him for who he is right now because he is different in many ways and you do not know him any longer. He is a stranger is your h's body, an alien, someone you can't trust when it comes to "money". Put your business hat on when you are communicating w/him.
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.