But even after all these years Nishikata didn't understand that he doesn't need to think about anything, all he has to do is just be honest... Well, that's better for Takagi. ^^
@Esper I think it's safe to say that, based on his behavior, she raped him in his sleep to conceive Chi and he has never seen her naked. He may not even know how babies are made.
@Esper There are things that still make a spouse embarrassed even if they are married for 50 years like complimenting the outfit, suddenly acting romantically, etc.