"Are you sure you don't have to stop by the hospital?" Sofia Torres asked her father as they began the familiar drive from one house to the other.

Mark had gone to pick up Sofia – who was just a few months shy of being able to get her driving permit – at her mothers' house. Just as they were about to leave, Mark had gotten a call from one of the nurses at the hospital.

He smiled, knowing Sofia wanted to go so badly. Yet, he also knew that most teenage girls didn't hang out in the burn unit. Her parents were trying to get her to participate in some more common past times.

"I'm sure," he smiled.

"Oh, come on!"

"Why can't you be more like your sister?" he laughed.

"Whining over a boy on every other Tuesday?" she asked.

The thought seemed utterly ridiculous. She and her sister were close, but Sofia just wasn't that kind of girl. She was focused, level-headed, and passionate. But not in the blubbery, overly dramatic way her half sister was.

"Have I ever told you you're my favourite?" he joked.

Clearly, the father of four didn't have a favourite. But he did appreciate Sofia's maturity. It wasn't that his other children, Ella and Charlie, were immature. If fact, they were about twice as mature as he had been at double their ages. They were just exhausting at times. Drama was one part of fatherhood he had never been a fan of.

"Then let me go pl-" Sofia stopped herself. "Then humour me. I only want you to be the best doctor you can be. And good doctors are at the hospital whenever they're needed. Even if it's just for something small. It shows their patients they care."

"Get back to me on that when you start your residency," he chuckled. "But fine. We'll go."

"Yes!"

"But no harassing the nurses to let you into patient rooms again."

"But you can't see anything from the hall."

Sofia's heart belonged to surgery. It had from a very young age. The blood and gore of the cases her parents discussed never made her feel queasy. Instead, it fuelled her interest.

"For good reason. You're not qualified yet."

"Oh, it's not like I ask to operate," she said. "And besides, I have four doctors bossing me around every day. I'm practically an intern."

"We're called parents."

"Minor detail."

"How often does Yang come over when you're at Madre's?" he asked. His daughter seemed more and more like her Godmother by the day.

"Not that much," Sofia said. "Because she's at the hospital all the time."

"We're going, we're going..."

"Thank you!" she smiled, feeling victorious for having gotten him to cave. It was so easy, too.

"Hey, so...Arizona isn't talking to me. Still," Callie said, when she found Mark alone in the supply closet. "Which...fair enough. I am having somebody else's baby. I probably wouldn't speak to me either, but..."

He laughed.

"That's not funny."

"I know. Sorry."

"You okay?" she asked. She wasn't actually questioning anything.

"Just...you and Robbins, continue."

"No, what is it?" she asked, sitting down beside him on the slightly dusty floor.

Mark told her everything. Yet, this he didn't know how to say. They weren't a couple. She was desperate to get another woman back and their feelings for each other just weren't like that. Yet, she was six weeks pregnant with his child. She probably wouldn't be too fond of the latest situation he found himself in.

"Never mind."

"If I have to go get Bailey, I swear I will," she said. "But don't make me. Because I'm exhausted and this kid has been making me puke my guts out all day. I mean...this kid is my dream, but still."

"Derek's wife's here," he began.

"Oh. Well, he's with Grey. It's not like he wants the wife back, right? I say you just stear clear of the whole mess for a couple days and –"

"She's pregnant."

"Derek's wife?" she asked. "Oh, God. He and Grey are actually hap-"

"Callie..."

Then it hit her. "It's yours?" she asked.

He didn't even have time to react before she shoved him just a bit, causing his arm to hit into the side of a storage bin full of adult diapers. "Torres, I didn't know –"

"Oh, you didn't know. So that makes getting two women pregnant at basically the same time is okay?" she asked. "I was kinda counting on being your only baby mama right now, Mark!"

"You told me I could just be cool uncle Mark and I said no. So now you own me?"

"No. But now...you've chosen to be in this. And are you still?"

"Yeah," he nodded. "Nothing's changed."

"What do you mean? Mark, that's a change. A big change."