The relationship may be a slightly chaotic mess of mind wrecking sex but it works and they're both happy. Thanks for translating.
Jun honestly did them no favors putting it in Akane's head that her love life needs to be a certain way. They aren't some kind of platonic ideal of lovers and they don't need to be; Akane and Nadeshiko are Akane and Nadeshiko, and what works for them works for them.