Reminds me, whenever I went out with my siblings, everyone we met simply assumed that I'd be the father..
"What a cute daughter you have!"
"Your son is so well-behaved!"
Examples of things I got to hear frequently enough. =/
Didn't help that my siblings found this highly amusing and always played along with those misunderstandings.
About the chapter, Nasuka play an important role in keeping things entertaining as usual..
And the male lead got a talent for misunderstanding things into weird directions, that the girl doesn't seem to mind as much as one might expect.
(Seemingly developing more and more weird interests along the way, as she gets dragged into trying things out.)