So, what you're saying is that I need to be clearer about when I'm joking. I'll try; sorry about the confusion.
Thematically, it feels like they eventually almost have to(for reals). Steven is a bridge between humanity and gemkind, and a human-Steven-gem fusion is the obvious symbolism.
She appears, but has no lines. Amethyst asks if she wants to participate; Peridot just walks away.