Hi Hope, the D may or may not go through. If it does, that doesn't mean the end of the road if you don't want it to be. There are many instances of the spouse starting to turn after D. Sometimes things need to go that far in order for realisation (that D hasn't solved things) to set in.
Gogofo is one such example (newcomers) and Lifes Twists (MLC) another. As for the house - IDK. I moved out and it has helped me not to be in 'our' environment. I'm in a new place and have my own things around me. Being in our house without H wasn't something I wanted to do. But I don't have kids, and so that is different.
With the narcissism, I have seen some mention of this in other posts. I think many WAS's display narcissistic traits within sitches. Whether there is an ongoing component of this depends on how long those traits have been evident I think. If your W has behaved that way for many years - maybe - but if this is new, it's likely linked to the sitch.
Good news on the custody - pleased for you xx
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus