I would be to the point and very clear that you intend to seek 50/50 custody and would prefer to reach an agreement amicably but that you are not going to simply concede to her demands.
Spot on.
I agree with the others that you being nice is getting you nowhere. Every time you are nice to her, you are just showing her that she has all the power here.
I KNOW you don't want to be "not nice" to your W. I get it. 100%. I have been through this same thing. Guess what? My H still wants to D me, and all my being nice has done has convinced him that he can screw me over more.
I can't believe that your W walks out, takes the kids with her, doesn't allow you to see them (well, not nearly enough, anyway) and then demands that you sell the house so she has money? WTF? Please, stand up for yourself!
BTW, standing up for YOU is not the same as controlling, so being a doormat is not a 180. When you say you want more time with your kids, you are not controlling her. Refusing to do everything on her warp speed timeline is not controlling HER.
If you want to send one more email and give her one more chance, go for it. If she refuses to acknowledge, or once again rejects, your shared custody proposal, then will you feel justified in moving forward with the legal process?
What email did you end up sending her?
me: 44 XH: 42 M 11 years D10 and S8 Bomb drop 9/27/13 D final 7/1/14