Their names reflect who they are. Calliope means beautiful voiced. Her voice never failed to send chills up his spine, with its sweet smokiness. He could tell just from listening to her that she had stories to tell, that she was complex, not like most of the women he'd been with. When she laughed, he soared. When she sang, he wanted to weep for its beauty. Her voice comforted him in a way he'd never thought possible.

Mark means warlike. His strength amazed her. He'd fought and he'd struggled. He'd been taken down, hurt by too many people before. They saw him as a sex machine, but she saw more. She saw his compassion, his loyalty, his love, his protection. He'd protected her when she'd been hurt and betrayed. And now he was protecting both of them. His strength comforted her in a way she'd never thought possible.

From the moment she'd found out she was pregnant with Mark's baby, Callie began picking up the pieces of her life. She'd broken up with Arizona. This wasn't her dream and Mark didn't delight Arizona like he delighted Callie. She'd finally realized, after George and Erica and Arizona that he'd been there all along. It was his shoulder she'd cried on when George died, when Erica left, when she sent Arizona packing. They'd been playing a game. Their fear of hurting each other had been so great that they couldn't handle the truth. But this baby put everything into perspective. She went back to his bed a week after Arizona left Seattle. There was no guilt. There was no sadness. There was joy. There was awe. Awe in each other and awe in the miracle they'd created together.

They'd grown together over the last five months. For a while they'd fallen back into their "friends with benefits" relationship. Until Callie realized she didn't live in her apartment anymore. She'd go there for more clothes. Dust was accumulating on her medical journals. The kitchen sink was filled with four weeks' worth of dirty dishes that she kept meaning to wash. Teddy Altman had come over to help Callie organize the baby's clothes one night when Mark was on call. She knocked on Callie's door until Callie appeared in the doorway of the apartment across the hall. Once the clothes had been folded and placed into the new dresser, next to the changing table, Teddy asked Callie what her situation with Mark was. Callie had told her that they happened to be best friends who were having a baby together. Teddy pursed her lips to keep from pointing out the obvious to Callie. Somehow everyone was able to see it except her.

Three nights later, Callie was sitting on the couch catching up on charts when Mark came through the door and dropped a set of keys into Callie's lap. She'd told him that she already had a set of keys to his apartment. Mark quickly corrected her with "our apartment." She didn't even flinch. It was their apartment. But the keys were for the new house. He'd found a perfect three-bedroom house only a few minutes away. Callie didn't even hesitate to say yes. That night they finally stopped avoiding the subject of their relationship. She was the mother of his child, his best friend, and he loved her. He was the father of her child, her best friend, and she loved him.

Sofia means wisdom. Her parents chose her name because she was the one who brought them together. She gave them the ability to realize how much they loved each other. She made them whole. She brought them perspective. She brought them clarity. She fixed them. Her being comforted them in a way they'd never thought possible.