I know that physical intimacy is the traditional yuri payoff, but I have to admit that I kind of enjoy the reversal here.
Ordinarily one or both of the parties wants to get busy and the story-problem is about getting them together. Here they are together for life already, and are slowly awakening to the awareness that there’s further business to get up to.
I don’t want all the stories to be like this, but the mutual cluelessness is pretty cute.