I want to see they have baby, It still gonna work. there are already a manga like that. Shame, last time i saw it, there is a cheating cliffhanger, likely to happen, right when the wife just giving birth.
@levyoasu: I'm guessing they're supposed to be the kind of couple that have "average" sex drives at most, in the sense that they only feel the need to have sex rather infrequently, and are pretty satisfied the rest of their time with nonsexual expressions of their love.
@shusi95 well, they literally seem to drink multiple times a week if anything. Let's just calling it functioning alcoholism for now since she's still able to go to work every day and function.