Scout and Jem at Bedtime

I love this scene. One of many incredible scenes in this classic film. I'm talking about the scene where Jem and Scout are about to go to bed, and Scout starts asking Jem questions about their mother. Melts my heart every time. I have a theory about it, and was hoping someone might be able to shed some light on it.

I interpret this scene (or at least parts of it) as being something of a tradition between Jem and Scout that they play out every night before going to bed. Not just the one time we see it. Some of Scout's questions and Jem's replies all seem somewhat automated, like they'd done it many times before, in much the same way. Jem seems very detached, and almost disinterested, but he's going through the motions anyway, because he knows it is important to Scout. There is nothing concrete in the film, or in the book (if I remember it right, I have read it a couple of times) to say whether or not this theory is correct. But when I look at the scene that way, it cements a bond between Jem and Scout that causes me to see them a little bit differently.

Any thoughts?