Sanderika's the nuts isn't she (do you have that phase it means good btw).
MLC relationships will not last as they are formed generally with people who are not emotionally secure. We have to be patient to outlast them if we choose to do so, and that's our choice remember. As standers for the marriage we choose that path - it's a difficult and frustrating one though.
I agree with Sanderika the H don't yet realise that they will gain more respect from returning and sorting out the M than for walking away. It's a stronger man who can admit his mistakes - not sure that my H is up to it just yet.
I hope that you continue to make good progress re the surgery.