One plot line that did not occur to us when we heard One Tree Hill alum Hilarie Burton had a guest role on Grey's Anatomy was that she might, in any way, come between Callie (Sara Ramirez) and Arizona (Jessica Capshaw). Calzona faced some tough times this season, but they seem to be in a good place, now. Neither would consider cheating, right?

Well, the preview for Season 9, Episode 22: "Do You Believe in Magic?" suggests otherwise. It shows Hilarie's character telling Arizona "you have really pretty eyes," before flashing to the word "unfaithful." Then we see Arizona say "you're amazing," and it's cut to look like she's saying that to Hilarie's character. Then you see Callie open a door and gasp, while a character who appears to be Arizona from the back looks at her. Finally, near the end of the preview you hear someone say "oh my god" while Callie looks sadly through a door.

The implications are clear, but we're not really buying it.

First of all, based on the Canadian promo, the shot of Callie looking through the door at the end is her looking at Bailey. Second of all, none of the other clips are actually particularly damning. Given the "you have really pretty eyes" comment, we wouldn't be surprised if Hilarie's character does flirt with Arizona. But Arizona's "you're amazing" — if it is about Hilarie's character — could easily mean "you're amazing as a doctor." That's the kind of thing Arizona would tell someone after they come up with a good idea, or save someone's life.

The official synopsis of the episode says nothing to suggest that there's any whiff of infidelity this week, and the Canadian promo is equally lacking any sign of bad things for Calzona. If this were a serious plot line, you'd think we'd have seen something about it elsewhere.

Our guess? This promo is just very misleading, and Calzona will be a-OK. Do you agree, or are you worried about Calzona? Watch the preview yourself, and sound off in the comments below.

Credit: YouTube Photo: Grey's Anatomy Season 9, Episode 22 Preview: Does Bailey Break? (VIDEO)

Catch the episode of Grey’s Anatomy on Thursday, May 2, 2013, at 9 p.m. ET/PT on ABC.

Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter @BeccaDMartin.