Obviously most of what I wrote was more about how I would have liked for their stories to have developed rather than how it is, obviously a bunch of stuff would need to be retconned if Tinkerer were to take my thoughts wholesale, but I figure there are elements that could be enacted. for example Mia's Gran would be easy, she could come forward one day (triggered by "n" days of neglect) "I've been watching you, you lazy no good layabout, I've been silent so far but no longer!
YOU WILL step up as a husband and a father
OR I WILL make your life a living hell...", Mia could see this and blame herself, swearing to herself to be more proactive in your sex life. [easy peasy]
... BTW re Mia getting pissed... I ignore her most of the time so she is always pissed at me
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, but technically even when she wasn't pissed she tended to refuse sex unless I made dinner.