Because my mind works like this, this gives me the notion of Sakuya filling Remilia and the others in on Gryphon's extended family by photos from all three weddings.

Gryphon: "That last one hasn't happened yet in my timeline."
Remilia: "You don't have to look the photos, dear."
Flandre: "Who's the slimey looking one with the bad tan?"
Gryphon: "What was Akio Ohtori doing at Corwin and Anthy's marriage?"
Sakuya: "Well he wasn't _invited_."
Meiling: "That explains why the bride is standing on him."