Summary: AU; It's been 10 years since they've seen each other. Now, they both find themselves meeting again. One of them has a shocking secret.

A/N: I thought about having Mallie be endgame, but then decided against it. So this is Calzona friendly, but the story mainly focuses on Mark. I'm not sure whether I want him with Lexie for this story or an OC... I have someone in mind for him. But I'm not going to put him in a relationship just yet. Please give positive feedback :)

Chapter 1

Their eyes were locked together across the hall. There she was. Callie Torres. She was probably the last person he expected to see at his new job at Seattle Grace. He made his way over to her as he saw her head towards the elevator. He was able to slide through the doors before they closed. "Callie." He stated. "Mark." She replied, not looking at him, keeping her eyes locked on the elevator doors until they opened. Leaving as quickly as she could.

Mark made his way through the doors of The Emerald City Bar. He glanced around bar and spotted a familiar face.

"This seat taken?" He asked, already taking the seat whether it was or wasn't.

She kept staring at him as he sat across from her. "Mark." She warned.

"Cal." He replied. A grin tugged at the bottom of his lips. "How've you been? It's been... A while." He spoke after a moment.

"10 years." She told him. "It's been 10 years, Mark."

He nodded. "Seems like it's been forever." He paused. "But then again, it's like it was just yesterday."

Callie scoffed. She didn't know how to feel about seeing him. He was her ex. The first person she really loved. "Yeah, I still remember walking in on you with another woman."

"Oh, c'mon, Cal." He huffed.

"I was committed to you, Mark. You were my best friend. I thought falling for you was the best thing because you wouldn't hurt me." Each word her voice was saying with more force. "But I was wrong. You did hurt me."

"I never meant..." He trailed off. "I'm a better person now." He paused. Callie raised her eyebrows at his words. "It's true. People can change you know." Mark said in defeat.

"Yeah, but Mark Sloan." She stated slowly as if he couldn't understand. "Doesn't change."

"I'll admit I was..." He paused looking for a proper word to use. "A jerk." He got out. "But I'm different now." He told her.

After a moment of silence took over he spoke again. "Look at you now." He said, trying to bring light to their reunion. "You look amazing." He meant that. She's stunning as ever. "I'm surprised nobody's swooped you off your feet yet."

"Actually, somebody has." She held up her left hand. "I'm married." She smiled at the thought of her spouse.

"Who's the lucky guy?" Mark asked.

"Gal, actually." She said, with a smirk. "I'm married to a beautiful woman." Callie told him. She loved her life with her wife. Wouldn't trade it for anything.

Mark's eyebrows rose at the mention of a woman. "Oh, really?" He tilted his head. "And you're happy with her?" He asked.

She nodded. "I am." She paused. "I really am."

"Then I'm happy for you." He paused for a moment. "I'm sorry." She stared at him blankly, wondering what he was apologizing for. "For hurting you. I didn't mean to ever hurt you of all people." He said. "I screwed up, like I always did." He explained. "So, for that, I'm sorry."

Callie nodded. "Thank you." She was surprised by his apology. But she could see that he meant it.

The two were then interrupted by a beautiful blonde hair, blue eyed woman. "Hey, babe." The woman chirped.

"Arizona." Callie jumped up from her seat, greeting her wife with a side hug and kiss to the cheek. "Arizona this is Mark, an old friend." She introduced the two strangers.

"Nice to meet you, Mark." Arizona said to the man. "You too." He replied. "Oh!" Arizona chirped, looking over at Callie. "Sofia is staying with April tonight, instead of Ben and Bailey."

"Who's Sofia?" Mark asked curiously.

"Sofia's our daughter." Arizona replied with a smile.