Callie gaped at Arizona as though she had shot her. She blinked and rubbed her chest, then her mouth opened and closed but no sound came out.

Arizona was afraid to hear what Callie might ask as soon as she found her voice. "Are you sure it's mine?" That degrading question had to be one of the first. Callie had no way of knowing that she hadn't been with anyone else since she had broken up with Derek over four years ago.

Instead, Callie said, "But we used a —" She seemed to realize the fallibility of their choice of protection because she fell silent for a second before finishing with a weak "It didn't work, huh?"

Arizona shook her head.

"You're sure?"

"I'm positive."

Callie took a deep, audible breath. "I don't know what to say."

"You don't have to say anything," Arizona replied. "I won't get an abortion. I won't put the baby up for adoption."

"I don't think I would have suggested either of those things, Arizona"

There it was. The way Callie will say her name, the huskyness, always made Arizona weak on her knees. It was what made her give in to her desires that night.

"Well, you don't need to worry about it, because I've been doing a lot of thinking, and I've decided that I'm perfectly willing to raise this child on my own. I feel it's only fair that I give you a choice, of course. But you can walk away, if you like. And I won't tell a soul you were involved at all, especially Addison. She doesn't even know about the baby yet."

"Addison," Callie said, smacking her forehead. "She sets me up with her sister, and I get her pregnant the first night. God, what was I thinking?"

Arizona had known this would probably be painful, but she couldn't help wincing at Callie's self–recrimination even though she deserved every heartfelt pang. Throughout their dinner together, Callie had made several comments that made it pretty clear she was still in love with Addison, but Arizona had liked het so much she had chosen to disregard them.

"Sof and this baby will be half–siblings," Callie said, the ramifications obviously starting to come home to her.

"They're first cousins, too," Arizona replied, talking fast now that her decision had been made. "That already makes them family. They'll be close with or without your involvement."

"I can't see you and…" Callie glanced at her stomach, her fingers itching to touch it. "…this baby at Sofia's birthday parties and pretend I have no connection. I — I can't just ignore this."

"Yes, you can," Arizona said. "This was my fault. I knew you were still in love with Addison. I just didn't want to face it." Arizona had known how happy Addison and Mark were, knew Callie would have to move on eventually, and thought she would be able to help her. Which basically meant she had been naive and stupid and now she had to pay the price.

Callie lay in bed feeling numb. Addison's sister was pregnant. With her baby. From one night's encounter.

What was she going to do?

Callie automatically thought of Sofia and how much she loved her. Kids were great. She had wanted several. Only she had always pictured Addison as the mother of her children. That's what were they, compatible. Compatible as parents, friends, acquaintances but never as lovers. She could still hear Addison's voice in her head, "there's no love between us. We are just friends, hanging out as partners". Callie was confused at first, trying to come up with something with which she could deny Addison. But nothing came out. And that was the start of their impromptu divorce.

Now Addison was married to Sloan and would probably be having Sloan's child someday. And Callie was…what?

Confused, she decided. Evidently being divorced wasn't bad enough. She's had to go and get a woman she barely knew pregnant.

She heard Arizona's voice in her head, saying that she was still in love with Addison and wondered if it were true. How did a woman draw a line between loving a person in a certain way before and loving her in a different way now? She and Addison has always been friends.

The phone rang. Callie glanced over at the digital clock on her nightstand and knew it had to be Arizona. Who else would be calling her at three o'clock on this crazy night?

She didn't want to answer. She needed some time to think before she spoke to her again.

Unless telling her she was pregnant had just been Arizona's idea of a cruel joke, a way to pay her back for what had happened…

"Hello?" Callie said, snatching up the phone before it could stop ringing.

"Cal?" It was Addy, not Arizona. And Callie hated that. "Did I wake you?".

"No." Stifling a groan, Callie closed her eyes and let her head fall back on her pillow. She had told Addison she would stop by Arizona's and then call to let her know that Arizona was okay. But she had forgotten. And Callie wasn't sure what to say about her visit, anyway. At the moment, Arizona wasn't okay. Neither was she.

"What happened?" Addison asked.

"Nothing," she said.

"Didn't you go to Arizona's?"

"I dropped by, yeah."

"Why didn't you call me? I've tried and tried to reach her and keep getting her message machine."

"She's probably asleep."

"Arizona's been acting so strange the past couple of weeks," Addison said. "I'm really starting to worry about her. Did she say why she didn't tell us she was leaving the movie?"

"No." Callie propped the phone up with her shoulder so she could rub both temples. Addison was obviously looking for reassurance, but she wasn't the person to provide it. After what she had done, her conscience wouldn't allow her to make any promises about Arizona's well–being.

"Was she very sick?"

"She said she was feeling better."

"Hang on."

In the background, Callie could hear Sloan trying to convince Addison to come to bed by telling her they'd visit Arizona first thing in the morning. She finally agreed and told Callie she had to go. But long after Callie had severed the connection, she couldn't stop thinking about Addison saying, "I've tried and tried to reach her and keep getting her message machine."

Why wasn't Arizona picking up? Certainly she wasn't depressed enough to…

AN - Maybe I should have made it clear from the start, but I didn't so here I'm making things clear - Arizona isn't a toddler in this fic who got taken advantage of. The hook up was consensual if anything. Let me peel back few layers of these characters in future chapters and you will know why Callie wasn't that much into the hookup (bit of it is in this chapter also) and why Arizona was so eager...