I think it's possible that some fathers, having left their wives, decide pretty quickly to remarry (or start living with a woman) so that there's a replacement women there to look after the children when they have contact/access.
Obviously this isn't true in all cases but it wouldn't surprise me if quite a lot of them did it for this reason.
After all, there are countless threads on here about so-called blended families, where the woman concerned just ends up as the default carer for another woman's children, and the actual father abdicates his responsibilities, leaving her to it.
AIBU?