Yeah, remember in Awakening how the child characters had a unique conversation with the mothers, but the fathers were generic conversations with the exception of Chrom and male MC. Well, here it's reversed, the fathers have the unique conversation with there child, while the mothers are the generics, so Kana will talk about flowers regardless of who the male MC gets S Rank with.
The exemptions in this game are female MC, Azura, and Selena who was Severa from Awakening, if she marries Subaki she will tell their daughter Caeldori how much she looks like her mother Cordelia and that she feels inferior to both her perfect mother, and now perfect daughter. As far as I know those are the only exceptions.