Its also possible that it started long before he showed any signs. Think back - did he show any signs of discontent or start questioning his life even before he identified his change of feelings?
Or another possibility, as Exquisite says, is it may just be a transition that almost became a crisis. I believe there is a spectrum, not a boundary, between transistions and MLC. That is why we see different types of MLC -some long, some short, some mild, some almost violent in nature. I read that it is the catastrophic effects on the person and the family around him/her that makes a transition into a crisis.
Hopefully his questions, his confusion will be resolved by his insight and make his transisition quick. If so, you are one of the lucky ones.
That is why you rarely hear of a single person having an MLC - its because there are less people affected by whatever they are going through.
Me:49 H:45 D:12 M:14 T:18 Bomb: 6/26/10 EA: 9/3/10, fizzled out slowly, now ??? 11/5/11 Retrouvaille Finally piecing.... Its peaceful at last, but we got a looong way to go