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Dialogue’s a bit hard to make out, here’s what I came up with, by panel:

PCD: And that’s how you ship ponies.
Changeling: Your Highness? Do you need any help? Is everything alright?
PCD: Ah, sis, I got it. The most brilliant idea ever. It’s about time to go to another level of shipping.
PCD: … And you’re going to be Rarity.

5007312 Chrysalis looks like she's traumatized. Cadance, exactly WHO are you shipping?