Photo Finish and Hoity Toity are actually archenemies. The reason that Photo ignored Rarity’s designs was because Hoity had expressed approval of them.
I also like to think that Photo Finish and Hoity Toity were married at one point, but then divorced. Their daughter, Silver Spoon, lives with Hoity. Well, sort of. He’s out of the house so often on business that it’s probably more correct to say “Silver Spoon lives with the house servants, and her father Hoity, when he’s home”.
Yes, I do subscribe to the fan-theory that Silver Spoon is only a bitch because her best (and only) friend Diamond Tiara is a bitch. She’s really a nice girl, she just doesn’t quite know how to “fit in”.