Yeah, I filed for the big D about 60 days into my wife's affair (Summer 2007), when she showed absolutely zero remorse and zero signs of turning back, despite having been exposed. Although her affair ended just a month later, it took us two years of fits-and-start piecing to put Humpty back together again, and as late as mid-2009 we went as far as meeting with a divorce mediator to determine who-got-which holidays, etc. I think that final look into the scary abyss -- and what both we and our kids would be missing -- was the final straw that made us stop holding the D gun to each other's heads and once and for all decide to REALLY work on our marriage.
One 25th wedding anniversary and two granddaughters later, we are stronger than ever, I'm happy to say. But for awhile there, it was touch-and-go.