Owen and Cristina are both free for a weekend, the first two days off together since November. They wake up Saturday morning, tangled in the sheets and around each other. The phone rings.

"Hi Mer."

"It's Derek, Cristina. Listen, I hate to bother you, but Meredith just slipped on the ice outside, she broke her ankle and it's messed up. The ambulance is on its way. Can you come over and watch Robbie?"

"You want me to – babysit?"

Owen raises his eyebrows in amusement. Cristina covers the receiver and says "Meredith slipped on some ice and broke her ankle and Derek wants me to come over."

Owen grabs the phone and says, "We'll be right there."

**

In the car, Cristina says, "I hope they don't think we're going to do this on a regular basis. And why would they call me? I don't know what to do with babies. And they poop! He's not potty-trained yet!"

Owen smiles as he turns a corner. "Derek called you because of this 'person' thing. And you are a doctor, you won't kill Robbie. You're thinking about this the wrong way. I grew up in a big family, remember? I've seen baby poo and it didn't kill me. This won't kill you."

Cristina sighs. "I've been looking forward to this weekend for a while."

He touches her hand lightly. "It might be fun, you know. From what I've seen, Robbie's a cute kid."

"He poops."

**

Derek returns home that evening. Cristina is in the kitchen, loading the dishwasher. "How's Meredith?"

"They're keeping her overnight. It was a bad break and Callie thinks she will need more surgery tomorrow. How's Robbie?"

Cristina waves towards the living room. "He's fine. See for yourself."

Derek looks into the living room. Owen is snoozing on the couch, his arms protectively curled around Robbie, who sleeps on his chest. Toys litter the floor.

Derek smiles in surprise and thinks that he has never seen Owen Hunt look so relaxed.

"He's in good hands."