Stand your ground, protect your kids, and yourself. Do not give in to her unreasonable demands, and do not allow her to get insulting with you ... if she does, just tell her you will not interact with her when she is attacking you, and when she can talk respectfully, and calmly then she knows where to find you. Make boundaries, and keep them. Make sure you are calm when discussing any separation issues, or dividing time with kids, and assets issues.
Know that this will pass. She will either go through with the D, and then realise that the grass is not greener on the other side (but, will stubbornly not admit it), or she will wake up and want to work on the M. You must not hope for either, or even try and control it one way or the other. You must work on you, and getting back to who you were before you met your W (only wiser), while being the best dad you can be. Well, that's my tickies worth, anyway.
Thinking of ya! Take care.
Me:57 H:52 M:28 Got another lawyer last year and filed. D35,S/D twins28,D22 EA4/04 End? Who knows? "Life is like a mirror. Smile at it and it smiles back at you." — Peace Pilgrim