Grey’s Anatomy is headed into its Season 9 finale tonight, and the storm is coming. Episode 24: “Perfect Storm” is sure to be drama-packed, with Meredith giving birth to her son (via a C-section in the dark, no less), and the consequences of Arizona (Jessica Capshaw) cheating on her wife, Callie (Sara Ramirez), with hot new doc Lauren coming to light.

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Ever since creator Shonda Rhimes revealed that a Calzona moment “stunned everyone into silence” at the table read, we’ve been worried. But the details of the emotional chat are even more heartbreaking.

Jessica Capshaw sat down with TVLine to talk about what’s to come in tonight’s finale, and revealed that the scene is a “bomb-dropping moment” that was “intense, devastating, and heartbreaking to shoot.” However, it’s not necessarily all bad — she says “it goes up, it goes down, it goes all around.”

In a sneak peek, we saw Arizona’s awkward confrontation with Lauren after their on-call room hookup, and from the sounds of it, the peds doc won’t keep her infidelity a secret for long.

“She’s not the kind of character that was going to have this covert affair and be skulking around on-call rooms and living this lie,” Jessica teased. “There’s a fallout! What happened in that on-call room with Arizona and Lauren is going to come to light.”

Plus, this moment was more “raw” than usual since they were at the end of the season and feeling exhausted, shooting with the storm around them. In fact, the crew applauded them after the scene cut, which “gives her goosebumps” thinking about it. “This moment, it was big. It was a big scene, and it’s intense, and it’s gonna getcha!”

To us, it sounds like they could be headed for divorce, but we hope to be proven wrong tonight. Do you think Callie and Arizona will split after this confrontation? Watch the full interview below, and then hit the comments with all of your Calzona feelings!

The Season 9 finale of Grey’s Anatomy airs Thursday, May 16, 2013 at 9 p.m. ET/PT on ABC.

Source: TVLine

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Alyse Whitney is an editor at Wetpaint Entertainment. Follow her on Twitter @AlyseWhitney.