I wonder whether it’s very much a love story between them and completely joint enterprise, or if one of them is pulling the strings- and honestly (and yes, I’m biased by experience) the descriptions shared on these threads of Moth as charming, charismatic, extravagant, etc make me think he is more likely to be the puppet master. The bit in TSP with the nubile massage ladies and her reaction (“I don’t blame you”) where it sounds as if he’s either played away before, or she has always expected him to, also supports this. He looks in that BBC clip like someone who’s keeping his own hands clean, speaking only about subjective opinion, avoiding objective statements. Nothing to be pinned on him, it’s her reciting the lines.
I also wonder about covert narcissism which means he has to look good to the world- she is the one who takes the risks: embezzlement, lies- and he enjoys the rewards (slate floors, powder-blue Rayburns, wholesome family man image). she could be desperate to keep him, and their dynamic is that she has to work for that because he could move on to another woman at any moment he chose. Now, it’s on her to keep his illness at bay. Maybe he can use that with her too, he needs to be doing specific things in specific places or he gets iller and more infirm, so he can pick and choose what he takes part in. I can imagine him effectively avoiding all tasks and duties that he doesn’t like, a bit like Disney dads who show up to dazzle kids and onlookers with their parenting skills, but never do a bathtime or the day-in, day-out work of routines and lunchboxes and organising.
Massive speculation on my part here, of course, but that’s the impression I’m getting.