Absolutely no-fault. But my L did make mention of his "affair partner" a couple of times in my declaration.
My D was long and drawn-out. I was divorcing a narcissist, so there was not going in without representation. 2 years of litigation.
If you can get your stbx to negotiate with a mediator or just the two of you, that is the best way to go. The litigated route ends up costing tens of thousands of dollars.Me: BS
2 kids: DD16 and DS19
Him: The Assclown NPD
OW: "friend" of 15 years
Divorced! Feb. 2010
Everybody, soon or late, sits down to a banquet of consequences.
~Robert Louis Stevenson