What do you want? A R with W is not an option right now. Ginen that what do YOU WANT? Take time to figure this out.

How often will you see your kids?
Her having full custudy can mean a bigger monthly cheque from you.
Financial questions about mortgage(s) need to be finalised. Are you going to pay rent and continue paying half the mortgage? Do you pay only half now?

Catering for what W wants should not even be a consideration for you now. It is time to MAN up and make a stand for what you want. Your future could depend on it

Best wishes

R 25 years
M 14 years
S11 & S13
Working on it alone since Oct 2014
M in trouble a lot earlier (~2 years)
Feb 2016. 1st R chat in a yr.
Next R chat Aug'17
Still together