It feels really great that the mothers get clued in on what is going on in the relationship. There might be more childhood friend tropes that they can help facilitate if they are in the know!
Mom blames her parenting for them not dating yet, but honestly her son is really put in his best effort on that front. Anyone else would have given up by now. I think it's a testament to how good her parenting is actually
The author certainly has indicated a number of times that Kaede is postponing dating on purpose, to fulfill a checklist of childhood friend action objectives. However, she's still a human, so she keeps flirting nonetheless, even if her intention is to stay as childhood friends until she has accumulated enough childhood friend experiences.