Peridot momentarily considers telling him that it wouldn't be happening to Childermass, because Steven's 'mom' would have straight up murdered him by now, but she decides against that course of action, thankfully.

His other words make her smile, though. She still looks sad, and worried, but she really hopes that it does help. "It's going to be okay, Steven," she says, and puts both hands on his shoulders despite how uncomfortable it is. "We'll figure something out to save you, we-- We're going to get you all back. And I know you can fight her, being a rebel is your thing! You're a crystal gem!"

And that's about as much touching as she can stand to deal with, and withdraws again. They may have limited time here in this dreamspace, and she feels like they should take care of exchanging information while they still can. "You're still warded against the Rose Queen, right? Remind me how that works, exactly?"