I've personally seen cases where the MLC person "snaps out of it" and goes back to their spouse who was the more passive one. There are also several sites that deal exclusively with MLC that have members describing that when they came out of the MLC fog, they were happy that their LBS remained stable and unchanging because the MLC person is so confused.
Once the fantasy is over (if it is one in their mind) they look for some kind of stability. And in some cases the LBS is able to be that stability.
Look up happy_again's posts in this forum. He was a WAH/MLC guy who eventually reconciled with his DBing, saintly, patient, Bo Peep wife! Very interesting to read from his POV.
me: 42 | STBXH: 41 | T: 18 | M: 10 | separation: Jan 3, 2010 | they deserve better: S7 & D4 current thread: http://tinyurl.com/3y8sxcp .: first breathe, then heal, then start LIVING :.