Good to see you!
Hope your camping trip was lots of fun with your boys.
Regarding XWW not responding, I think it is out of the WS play book, about control, trying to punish and not "allow" you to move on with your life (how DARE you!) and the fact that you are pisses her off. The last death throes so to speak.
As others have said be careful offering her more £, really she should just get the absolute minimum you can give legally, of you can do this, she has Gru the poo now to finance her, and other than child support there's nothing else you have to pay her. keep crickets as much as possible and no ego kibbles (crickets taste much nastier for her) and are better for you and your health, there's only a few more weeks to go so let her show herself to the judge to be the idiot she is, despite a co-operative ex H that you're being, hopefully she'll piss the judge off with the 4 bed house crap, and she'll not get all she wants.
My bro had the same thing with his now exW, made offers for buy outs, put figures on the table, in the end she crumbled somewhat at court and took less than she went in for because of him highlighting his prior efforts to the judge to no avail with her prior to going to court.
Take care and put you and your boys in the number 1 spit and leave her in the trash. She won't "see" Nor accept anything nice you offer her because she is still in la la land. Nothing will be good enough so give her the minimum and keep the rest for you and the boys to enjoy for YOUR and THEIR future. It's great that you can keep the house and provide them with that stability and familiarity.
That abbondad is going to be with you is uber cool and brilliant!
Please keep us posted we miss you!
Glad to see you're continuing to move forward.
Edited due to stupid ipad auto-non correct!