She didn't really understand it, but the only emotion besides sheer heartbreak she could fell was jealousy. Yep. Jealousy. It was almost laughable, really. Callie was having Mark's child and Arizona was envious.

She wasn't jealous of the actual baby, though. She hated that Callie's dreams were coming true and hers had crumbled into what felt like irreparable pieces. Sure, she had messed up, but she had come back and laid her heart on the line, only to be rejected in such a terrible way.

She logically understood that this wasn't exactly how Callie wanted things to be. She would rather be married, or at least in a stable relationship, when a child came along. Still, she was probably still happy. Even if that wasn't her first reaction, it soon would be how she felt.

Meanwhile, Arizona couldn't see her feelings changing anytime soon. There would be other women, but not a single one could ever compare to Calliope Torres. She felt like the best days of her life had already been lived and she had been too stupid to really, truly live them.

"Robbins!" she heard him call.

Fantastic. Mark was pretty much the last person she wanted to see right now.

"What?" she asked, turning around.

"I need you," he said, handing her the chart of a four-year-old patient of his.

As she flipped it open, he decided to try and break the awkward silence.

"Callie still not talking to you?" he asked. "Give her time, Robbins. She loves you. I know she does. She's just...hurt."

"Apparently she was loving you at some point, too," she shot back.

She hadn't meant for these words to travel from her mind to her mouth, but they just had.

"How did you know -?"

"Well, that's how people make babies, Sloan," she said, this time trying to be as nice as she could.

"Huh?"

"She told me," she said. "You don't have to play dumb, Mark."

Then she saw the extremely puzzled look on his face just before the realization set in all over it.

"Oh. She hadn't told you yet."

"No."

"Mark, I really wasn't trying to..."

"Where is she?"

"Really. I just figured that if she told me, you already knew. I'm not trying to cause a problem here."

He just walked away, trying to find Callie as fast as he could. It took him almost fifteen minutes, but he eventually found her asleep in one of the on-call rooms.

"Mark..." she groaned. "I'm not in the mood."

"Why didn't you tell me?" he asked.

His tone wasn't necessarily one of anger, but sadness. He knew Callie was going through a lot right now, but he had hoped she would've trusted in their friendship enough to know that he would've been there for her. He would to anything for her and now for their baby.

"How did you...?" she asked. "Oh. Arizona."

"Yeah."

"I just..." She sat up. "Mark, this baby probably means that Arizona and I are never...it isn't...we won't work out. Lexie already left you when you wanted to help Sloan raise her baby. Why should two of us suffer that heartbreak when you could be happy with her?"

"You weren't going to tell me I have a child?"

"I figured you'd put two and two together," she explained. "But I also know that no matter what, you're going to be there for us. Whether I told you or not. So I wasn't too worried about it."

"That's the stupidest, yet sweetest thing I ever heard," he said. "You really would do that for me? Go through this alone just so I could be happy with Lexie?"

"I wouldn't be alone. I'd have you. You'd just have all three of us," she said, her hand on her stomach.

"It's still stupid, though," he said. "Torres, if I'm gonna be Daddy, I'm gonna do it all. I chickened out with Sloan. Big time. Not this time, though."

"What about Lexie?"

"If we're supposed to be together, we will be," he explained. "You and Robbins, too."

"You really believe they could forgive us? And accept the baby?"

"If love's enough."

"I really hope it is."