why wouldn't they? there are people who keep photos on their shelves like a timeline
and why would they keep a photo of an accomplishment (e.g. a graduation) on the shelf, just because they are adults with children now? shouldn't your kids she how you finished school and graduated the same way the should?
thank you for the chapter, lol Yuka's car washing fantasy her pondering what could have been where so adorable and endearing... Also I'm glad she also foresaw one of the more prominent consequences of unprotected handholding at her age.