That's likely the case, given the mother's question about marriage, then the smile, then the daughter appearing, and then the daughter catching the bouquet, it all seems to just imply those two will go together.
While it may comes across as creepy, the age difference isn't actually huge between them (7 years); however if we assume they're 18 here, that means the daughter is currently 11... which is creepy if they're apparently eyeing each other at this time.
Anyway, this was a simple fun read, thanks for the translations and all that.