Shonda Rhimes, Jessica Capshaw

Attention, Grey's Anatomy fans: There's hope for Calzona.

Showrunner Shonda Rhimes defended her decision to have Arizona (Jessica Capshaw) lose her leg as a result of last season's plane crash in a blog entry Thursday. While the amputation may be a temporary setback (to say the least) for Arizona's relationship with her wife, Callie (Sara Ramirez), Rhimes promises that this won't be the end of the line for the couple.

"Callie and Arizona are going to have a fun romance-y, sexy love life again," Rhimes writes. "I stated in the Writers Room that Arizona could not lose a leg unless we were going to see how a person missing a leg could be sexy and fun and romance-y. So get ready for it — Arizona is gonna get her mojo back in a BIG WAY."

Grey's Anatomy's Ramirez: I'm concerned about the future of Callie and Arizona's relationship

Rhimes says the rekindling will happen before Valentine's Day, but the characters will face a bumpy road to get there, especially after the reveal in this week's episode that Callie defied Arizona's written orders by having doctors amputate her leg (in order to save her life, but still).

As for Callie? "Callie is no hero," Rhimes writes. "I think it must be terribly difficult to be Callie right now. To have your partner hate you. To have your sex life taken away. To have your BEST FRIEND taken away. Arizona has been taken from her and Callie is doing her best to survive that."

Grey's Anatomy recap: "Remember the Time"

Rhimes also has high praise for Capshaw, whom she calls "fearless" for her handling of the material this season. (Responding to critics who have speculated that Arizona lost her leg because she's a lesbian, Rhimes calls the theory "insane.")

"It felt real to me that Arizona would lose her leg," Rhimes explains. "That someone we love so much would go from being ambulatory to WORKING on being ambulatory, that we would begin to understand what it is like to be differently abled from watching a person we love BECOME differently abled."

On the heels of the first two episodes of the season, which were real tear-jerkers even by Grey's standards, Rhimes also assures fans that the rest of the season won't be so dark.

"I'm in a happy place, y'all," Rhimes writes." Which means Happy THINGS are happening. I'm freaking the Writers out with all the Happy Things that are happening. But it feels right and it feels real. So I'm going with it."