“””Bride and groom have same father is what that would mean.”””
No. It means the groom’s father is walking her down the aisle. What’s weird is what you got out of it.
Brides father walks bride down the aisle.
Ergo, same father, symbolically.
Whole thing is weird and freakish and these degenerate disgusting royals are sad and have no reason to exist as royals. It’s a joke, kings and queens and princesses.