Had an emergency phonecall w/ my IC, who really put things in perspective for me. God bless her.
She gave similar advice as you, lt0402, to just chill for a while, but later be willing to apologize for making an insensitive comment questioning her commitment to our kids, and if she pushes back, be prepared to say (succinctly) why I question her commitment ("Because I feel you *are* being selfish right now, not having tried everything to save the marriage.")
Overall, IC advised, don't lose my backbone, and don't get deep into detailed arguments.
Me: 50, MLC/WW 45 Young kids Nov 2015: BD1 Apr 2016: BD2 Jan 2017: W filed Feb 2017: D final