There are, of course, people she has to tell.
Her mother's response is more of an atonal shriek, and Cristina puts the phone down for a few minutes to ensure the continued survival of her eardrums. When she picks it back up her mother is talking excitedly, completely unconcerned that Cristina hasn't responded.
The minute Cristina hears the words '400-person-guest list' she hangs up the phone. That settles it. They're eloping. Maybe George and Callie could recommend a nice place in Vegas.
Her mother calls back.
Meredith is quiet for a minute before saying "seriously?" like someone kicked her puppy. Cristina really, really doesn't want to have a conversation about how they'll still be friends and this won't change anything, because please. She's still Cristina. She hasn't changed, and she won't change, even with a ring on her finger. Ok not an engagement ring, but she doubts Burke will let her get away with giving back their wedding ring.
Meredith makes a few more pathetic noises before smiling and saying she's happy for them. That's more like it. If she's going to get married, everyone is going to damn well be happy about it.
But when Meredith starts laughing about throwing a wedding shower and picking out china patterns, Cristina thinks maybe they'll have to have a ceremony, if only so she can force Meredith to wear a really hideous dress.
Izzie immediately demands to see the ring, and becomes confused when Cristina explains that there is no ring.
"He didn't get you a ring?" Izzie's horrified face implies that this is worse than George and Callie's marriage.
"Of course he got me a ring. I just choose not to wear it. Or whatever." Cristina keeps walking, and also scowling.
"But, why?" Izzie is completely baffled. Cristina hopes Callie moves into Meredith's house, and walks around naked all the time.
Bailey's reply is predictably deadpan, and has George and Izzie giggling to each other all during rounds. Cristina ignores them because as soon as everyone wasn't looking Bailey whispered her congratulations. And also that she'd better try her best not to screw it up.
Which is a fair point.
She feels pretty stupid, sitting alone in their bedroom, talking to her dead dad. But he's still her dad, and she thinks he would want to know.
"Daddy I'm getting married."
Fin.