Considering the dialogue that follows I believe it was meant to pretty clearly display Peridot’s affection/admiration/feelings towards Amethyst and her embarrassment at Steven noticing her in a somewhat compromising position on top of Amethyst.
Peridot: Ah!
[Peridot jumps off of Amethyst quickly]
Peridot: It was an accident, I swear!
Steven: Hey, don’t worry about it.
[Steven walks closer to Amethyst and Peridot]
Steven: We know you didn’t mean to start the drill.
Peridot: Uh… Yeah… That was an accident, too….
If that’s not shippy, I don’t know what is.
-Attilee
