What's the commission on your home, $5K, $10K, $20K and if you're going to use it to pay for any amount still owing on your mortgage it would appear that you are not losing out on anything because someone would have to pay for that shortage, probably you. Who was taking care of the bills when you were in your 2 year slump? Since she's working, I'm assuming she was. She didn't have to sign an agreement, she just did what needed to be done because it HAD TO BE DONE.
Arguing over this is dumb.
Call her.
"Wife I will sign the agreement, bring it over anytime, the sooner the better so that my stupidity doesn't change my mind again on this, I definitely don't want to argue about this anymore. I know doing this won't bring you back to me and that's not the intention, my intention is just to show you that I will do what I said I would do, plain & simple, I am a man of my word and I'll sign a piece of paper to prove it to expedite the process of selling the home and taking care of what's owed on the mortgage. I also promise not to discuss the relationship with you anymore, you're free to do as you please and I won't stop you or stall/slow down the divorce process at all anymore, no more kids games. We're both adults, it's time I started acting like one. If you ever want to talk, call me, I'll be there and NO I don't have to sign an agreement on that one. You know I love you and wish you the best and want only good things for you regardless of what happens between us. As for the counseling, I don't want you to do anything you don't want to do and I don't want you to be uncomfortable doing this either, do what you feel you need to do, I'll be OK regardless."
And that's it.
Enough of this nonsense, that's why she's so bored of you, you're addicted to the drama more than she is!
Well?
Did you contact her yet on getting this commission agreement in place?
