Wait, Cadence mentioned having a daughter, an alicorn, so Flurry Heart
But it wasn't mentioned when, only that after steeping down and creating her own kingdom, marrying, getting pregnant, etc.
So I'm guessing meeting Flurry Heart is possibly planned in some way in the future?
I would be also ironic considering how what Cadence tells at the end, knowing that her daughter will be like her and some mortal will claim her, etc fears of a mother XD
It would be ironic if it would be player
So either Flurry Heart could be possibly of similar age as Apple Bloom, Scootaloo, Sweetie Belle or a possible time travel to the future shenanigans. Could be caused by Twilight, Trixie, Starlight doing magic schenanigans and sending player into the future or something similiar