I couldn’t agree more, she should’ve been the first one to know about it. I feel he kinda had this bond with his mistress cause when she lost her mother, he was there for her and vice versa. But again how could he not even once talk about it to his wife. I hated how the mistress acted afterwards like she was something great, like dude you’re love was out of pity.
I think he sympathized with her and kinda felt bad for what she was going through initially. Moreover, I think they bonded when the husband dad died and he had someone to talk to about it, because his wife was going through a hard time cause of the miscarriage and he probably dint want to burden her more.