Who has heard the term chaos kid? Google it - interesting theory that if your spouse had a traumatic childhood for the first 10 years of their life then they are destined to have a MLC. Basically they try to relive their messed up childhoods subconsciously. You can do the algorithm to determine how long approximately they will be in crisis mode and steps associated to deal with it. It's worth a read.
My w was most definitely a chaos kid and her timeline is approximately 18 months.
More food for thought- Any comments from the DB board???