I am not so sure that if people know about an A that it is harder to come back. It is the guilt and feeling of letting everyone down that makes it hard for them. If the MLCer moves out and in with the OP, how can relatives and others not know?

I don't think it changes anything at all.

The Bomb: 08/05
H moves out: 06/2006
H moves back: 01/07 & Out again: 01/07
H moves back: 03/08 & Out again: 04/08
H moves back: 05/09 & Out again: 07/09
Divorced 08-12
Kids: 22, 20, 19