I just watched it again (time to kill at home today).
I think he is a sociopath - all his interaction with his wife are completely about him. The way he doesn't blink or miss a beat when she shows up at the care home, when his wife asks about the lip balm etc. He talks about all she does form him at his birthday but doesn't say I love you. Either he is entirely innocent, which we know he isn't, of he is a mastermind of deceit.
He mentions how much his W supports him, enabled his career etc. He is "about to be successful" but isn't yet. I think she has funded their lifestyle for years, all the while he has been betraying her. And she has believed him and believed in him, and loved and supported him. And she is about to find out that everything she thought about him and their life was a lie.
He's a "charmer" who has used a successful woman to support him financially, in a nice life, all the while he is living a secret life.
What was the dinner party comment about the red hair, and then the proposal and the friend says "oh so she was ..." or something - what was that about?
ATM I'm in agreement with the theory upthread that he is sleeping with lots of OW.
But I don't get why all these people are colluding with him and keeping DrF in the dark about secret holidays etc.
Roll on next week.