Antonia - this is the type of garbage they spout. My h told me how much more welcoming OW's family was to him than his own. I mildly pointed out that the situation was somewhat different [didn't add that since OW makes a habit of this - her three kids all have different fathers and she always has a man in her life - they probably had to become used to any new man]
The point is that reality doesn't really impact on these guys. The world is the way they feel it should be. The family he has abandoned all ought to be cheering him on, right?
My mother's death was one of my h's MLC triggers, I believe. I also suspect he would never have dared to leave me while she was alive! His own mother gave him a very very hard time, as I am one of the unsual ones on the boards whose MIL supported her. Sadly she died with them unreconciled. One of the many reasons why I think my h will remain stuck.