A/N: Hiya! Sorry for the kind of late update…I have been super busy with school. In fact, the updating was doing to be even later until I realized I already had this chapter written! Yay! Ha. Anyways, hopefully I can write more this weekend. Thanks for all your lovely reviews, as always, enjoy and everything goes to its rightful owners!

The weekend flew by very quickly for the female detective and her everything but blood son. It was filled with rental movies, homework, and takeout food. Calvin couldn't seem to stop talking about his new friend, either. He was chatting animatedly on their way to school Monday morning.

"Do you think Marcus will be able to come with us next Friday too?"

Olivia glanced in her rearview mirror before answering. "Hopefully, Cal. But we'll see, he does things with his nieces and nephews."

"He should bring them with him then," Calvin stated simply. "I wouldn't mind."

"What if they don't like the movies?"

"Then we can do something else!"

Olivia looked at Calvin when it was a red light with a smile, "You must really like him."

Calvin nodded, "He's cool." His eyes lit up, "Since we're friends, does that mean if I get in trouble at school I won't get detention?"

Olivia gave him an amused expression as they pulled up to his school. "Ha, nice try, but no, and don't you even dare think of doing something stupid."

He gave her a lopsided sheepish grin as he got out of the car. "Just messing with you, mom."

"You better be," She grumbled. "Aunt Kathy will probably be picking you up today."

"Okay. See you later." He shut the door and walked towards his school.

Olivia watched him go in the school before driving off to the precinct.

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-

Olivia was in the elevator at the precinct when her phone vibrated. She pulled it out and answered it as the elevator dinged, signaling its arrival at her destination. "Hello?" She answered, walking towards her desk.

"Olivia," A familiar voice said warmly.

A smile grew on the detectives face. "Marcus, hey, not to sound rude but how did you get my number?"

"Oh, I thought Calvin would've told you. He gave it to me at the theater; I hope that was alright…"

Calvin, Olivia thought to herself, momentarily closing her eyes. "No, it's fine. How can I help you?"

His laugh through the phone made Olivia's smile grow as she sat at her desk. "I was hoping we could schedule another date."

"Oh? What did you have in mind, Mr. Principal?"

"I would go fancier and ask you out to a nice restaurant on the weekend, but since both of are weekends seem pretty busy, how about lunch at the café again? Unless you're sick of it?"

"That sounds great. When?"

"Tuesday?" He paused, "And Thursday and possibly Friday?"

Olivia laughed right as Elliot walked in. He gave her a questioning look. She waved him off and turned her attention back to her phone conversation. "Hm, I can do Tuesday and Thursday, but not Friday, Calvin has early release."

Marcus snorted, "Right, I should've known that…Also, I'm taking my nieces and nephews to the park Saturday afternoon, would you and Calvin like to join us? My eldest nephew is around Calvin's age."

"The park sounds great," She told him. "Calvin won't quit talking about you."

"Really? I hope they're all good things…"

"They are," She insisted. Olivia looked up as Captain Cragen walked out of his office, he motioned for her to come. "Uh, Marcus, I have to go, duty calls."

"Alright, see you tomorrow. Bye, Olivia."

"See you then." She walked quickly over to the Captain's office before Elliot could even ask who she was talking to. She knocked quickly before opening the door, "Captain?"

"Benson," He greeted. "Have a seat."

She sat and waited patiently until he started speaking.

"You're probably wondering why I called you in here," He started.

Olivia nodded.

"I have a case for you."

"Shouldn't Elliot be in here too then?" She asked confused.

"No," He said slowly, as if debating. "This case…I need you to go undercover."

Terrible memories of her undercover job at the woman's prison flashed through Olivia's mind. "Undercover?" She asked carefully.

"I know that this won't be easy, with your son. And believe me, I would've asked Fin or Munch if I could have. But I needed a female."

"What's the case?" She asked.

Cragen slid a file to her over the desk. She glanced at him before opening it. Inside were numerous pictures of, what Olivia could tell, prostitutes. They were all covered in bruises, and were laying on the ground, dead, with duct tape covering their heads. She looked back up at her Captain with a question in her eyes.

"I need you to pose as a popular prostitute's guard."

Relief washed over the detective's face. She had been worried he wanted her to pose as the prostitute. "Why me?" She questioned.

"The street detectives needed a special victim's officer, someone who knew what they were going into. You will be joint working the case with them while you are undercover," He told her.

"Is this between you and myself, sir?"

He nodded, "Only tell Elliot need to know. You'll need to explain some, I presume. That's all, you leave tomorrow."

She stood, hesitating before leaving the office. "How long will I be gone?"

"As long as it takes."

Olivia left the over and walked back over to her desk. She sat and put her head in both of her hands, her head was pulsing painfully.

"You alright, Liv?" Elliot called over from his desk.

"Yeah…hey, can you call Kathy for me and tell her I'll pick up Calvin from school instead?"

He gave her a questioning glance while picking up the phone off of his desk. "Sure, but why the change of plans?" He paused, "No answer. I'll try again in a few minutes."

She nodded, "Thanks."

Elliot stood up and pulled his chair over closer to her desk, "What's up?"

She glanced at him before running a hand through her hair nervously. "I have an undercover assignment. I leave tomorrow."

Surprise flickered across his face. "What's the assignment?"

"I can't say. I'm supposed to tell you need to know only, sorry."

"Okay," He responded slowly. "How long is the assignment? Can you say that?"

She bit her lip, "I don't know. However long it takes to finish."

"I see."

"Do you think Calvin could….?"

"Of course, no problem. Dickie will be thrilled."

"I don't know how I'm going to break this to him."

"Don't stall," He advised. "Just come out and tell him."

She nodded and started turning her attention back to the stacks of paperwork on her desk.

-.-.-.-.-.-.-.-.-.-.-.-.-.-

When she arrived at Calvin's school a few minutes early hours later, she pulled out her cell phone and touched the number on the screen that had last called her.

"Olivia," Marcus' voice answered. "What can I do for you?"

"I'm really sorry to say this, but I'm going to have to cancel on you this week. Something for work came up…" She trailed off.

She heard him exhale slowly on the other end. "Well I can't say I'm not disappointed, but I understand. We can reschedule once this work thing is finished, yeah?"

She smiled sadly, "Yeah, we can. Sorry again."

"Be careful," He told her before hanging up.

Olivia signed and shoved the phone back into her pants pocket. The school bell rang. She saw Calvin come out and look around for Kathy. Olivia honked her car horn quickly. He looked over confused before walking over.

"I thought Aunt Kathy was picking me up today?" He questioned while getting in.

"Something came up." Olivia pulled out of the school and headed to their apartment.

"Is everything okay?" He quickly noticed she was tense.

"Cal…"

He turned to look at her, there was question and a bit of nervousness in his eyes. "What is it?"

"I have a special job for work starting tomorrow."

Relief washed over his face. "What kind of job?"

"One that requires me being away for awhile," She told him slowly.

His eyes flew to her face. "For how long?"

"I don't know," She told him truthfully. "Hopefully not long." Olivia could see the gears turning in his head, processing the information.

"What am I going to do while you're gone?"

"Stay with the Stabler's."

"So…it'll be like a really long sleep over?"

She nodded, "Exactly like that. Are you mad?"

"No," He said offering her a smile. "I understand."

"You are the best son in the world."

"Tell me something I don't know," He responded with a grin.