Another way to read it is this: Nanase's problems are so far above Mr. Kitsune's pay grade he'd need a space shuttle to get close. Of all of them, the fact that Nanase has been trying to come to grips with being a lesbian is probably the easiest for him to grasp. Magic, monsters, aliens, governmental conspiracies, extra-dimensional quasi-deific faeries... This is his wife's world, even if she doesn't like it, and he really can't do anything to help prepare or protect his elder daughter. Akiko, on the other hand, has not shown herself to be magically inclined, has a very sensible head on her young shoulders, and her problems are trying to make sense of the latest youth-oriented movie or TV show. Akiko is, in other words, Mr. Kitsune's speed, something he can deal with. And the fact that she's too mature to even properly bribe makes it all the more pleasant.