Credit: Ron Tom/ ABC

Calzona fans, are you still breathing? We know Grey's Anatomy boss Shonda Rhimes told us that things between Arizona and Lauren (guest star Hilarie Burton) would go "very, very far," but we never wanted it to be true! In the penultimate episode of Season 9 (Episode 23: “Readiness Is All”), Callie and Lauren hooked up behind closed doors and fans everywhere let out a collective gasp. Did Arizona really just cheat on Callie?!

Sad to say, but yes. Everyone's favorite tiny humans doc sealed her fate when she locked the door and proceeded to lock lips with Lauren. And that's not even the worst of the storm, Grey's fans!

According to Shonda, something so shocking happens in the Season 9 finale that it left the entire Grey’s cast stunned at the finale table read!

“There was a [Calzona] scene that was such a breathtaking moment that it stunned everyone into silence,” Shonda told TV Line. “It’s the culmination of a [season-long] journey for these two characters.” Uh oh. Why do we get the feeling that Calzona might be dunzo for real this time? But they've been through so much — car crashes, plane crashes, amputations, etc. — can it really just end there? 

Are you upset that Arizona cheated on Callie? Do you think they'll [gulp] divorce?! Sound off in the comments below!

For more Grey’s spoilers, click here.

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