Despite her best efforts to be a reassuring weight on Steven's shoulders, Amethyst has been notably tense all this time, listening to everyone speak with increasing anxiety. When the Summer Queen makes her proclamation she relaxes a little, but it doesn't dispel the deep unease the Rose Queen is making her feel, or how that's compounded by her concern about Steven. She does squeeze him gently when he starts shaking, though.

"You tell 'em, Steven," she mutters as he turns to leave. He doesn't look back, but she does, when she hears the Rose Queen cry out; she swings her head round behind Steven's shoulders to glare, and flickers her tongue out in the Queen's direction. She's a snake, who's gonna know?