i think the crisis starts way before the bomb is dropped if that is what BD means. I know my H started showing signs of the "wandering eye" several years ago. But he didn't start to act all weird and like a different person until he had the A with his co-worker. He emotionally detached from me then and hasn't been back since. He fakes it, but it's just pretend. He has admitted that he doesn't know what he wants. I believe the MLC was triggered with the death of his dad, then his sister, then his uncles all within a couple of years. And then a job he hates, and a co-worker that was like a guy friend he could have sex with too. Then he just spiraled out of control. Classic story about MLC. I wish I could help him, cuz it breaks my heart to see him struggle so, but I have FINALLY realized there's not one thing I can do..everyone has been telling me that for months now..but stupidly I thought I could save him.
It's hard to know how long any of these MLC people will be in it. Sometimes I even wonder if MLC is just an excuse to cheat on your spouse..and keep doing it because they're "Sick" or "can't help it". Ba-loney.