No where in this post did it imply that his wife has this behavior. HN nerds have a really bad habit of conflating and projecting. I'm sorry about your father, but you can't infer that about his wife from the given information; the severity of that implication is why your experience is as extraordinary and makes it difficult to buy that his wife is the problem.

Imagine if we were advising him to remain silent about this to his close business associates. Would we advise an engineer having a rough go of it to not talk to their manager? Would you advise a student to not talk to a parent if they were having a really hard time at school? What benefit would remaining unproductively silent about these problems other than choking on your own poison?