"What?" Was the only thing that came out of Olivia's mouth "What the hell are you talking about?"
"I didn't want to tell you cause I know you would get freaked out" Mark told her with a shrug of the shoulders and stuck his hands in his pocket.
"I'm not freaking out. I'm…I'm just…surprised" She managed to stutter out.
Mark just looked at her and raised his eyebrow knowing she was freaking out in her own way "You don't even believe what you're saying do you?"
"No" Olivia answered. "How can you not tell me this?"
"Because it's not a big deal, its not like he will come out"
"So the man that wants to hurt me spent two months with my husband?"
"I beat him up, if that helps"
Olivia looked up at him knowing the only times Mark was violent if it concerned her or the kids "What did he say?"
Mark let out a deep breath knowing he shouldn't have told her "He talked about you"
Olivia sort of nodded "Ok"
"Olivia he isn't getting out, you know that" Mark assured her.
They heard the door to the roof open. Before Olivia noticed her hand automatically went to her gun and pulled it out involuntarily.
Elliot quickly stepped back seeing Olivia aiming her gun at him "Um…Vaughn is here" He informed her and went inside and closed the door.
Mark looked at Olivia and her hand was shaking. He pushed the gun away and took her in a hug. "I'm not letting anything happen to you"
Olivia just nodded "I know" She whispered as she slowly put her gun in her holster. "Your dad is here"
Mark nodded "Hell of a day huh?"
Olivia smiled a little "Yea."
"C'mon" He took her hand and led her to the door "Ready?"
"Only if you are"
Mark let out a deep breath and nodded "Let's do it"
They went down stairs and went to Cragen's office where everyone was standing by the window looking at Ryan Vaughn in the interrogation room.
Fin and Munch were the first to turn around and spot them "Does he know?" John asked.
"That my family is fucked up? Yes he knows" Mark answered. George opened his mouth to say something but Mark put his hand up "Don't"
"Olivia should you and me go interrogate him?" Elliot asked.
"Let me do it" Mark spoke up.
Olivia looked over him "Mark"
"He doesn't know I'm his kid, I can use that" Mark told her "I can handle this don't worry" He said in a lower voice.
"Use my badge" Elliot told him and threw his badge to him.
Mark clipped it to his belt and left the office.
Olivia quickly looked over at Cragen "Captain he cant handle this, you cant let him go in there"
"Olivia he is federal agent, he's cool under pressure"
Olivia shook her head and looked through the mirror "He will lose it, just watch. I know him better then you"
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Mark took a deep breath and went into the interrogation room and closed the door behind him. "Hello Mr. Vaughn"
Ryan looked up "Hi. Who are you?"
"Detective Elliot Stabler" Mark answered since he didn't want to tell him his real name. "I know you talked to Benson earlier but she's busy"
Ryan nodded "I came by because detective Benson told me that your thinking the Anderson case might not have been suicide"
Mark looked up at the mirror and then back at his father. "Well…were not sure"
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Cragen, Elliot, Fin and Munch all looked at Olivia at the same time. She just shrugged and kept looking through the mirror.
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Mark paced around the interrogation room "Ryan, can I call you Ryan?"
"Sure"
Mark nodded a little as he crossed his arms on his chest. "You were intimate with Lilly Anderson, correct?"
"Yes"
Mark smirked and sat down on the table by Ryan "Get her knocked up?"
"No." Ryan looked up at him "Why do you ask?'
"Standard procedure" Mark answered.
"It's a private matter don't you think?"
"Not unless there is a child involved"
"Detective Stabler that child would be well over the adult age don't you think?" Ryan asked looking at him.
"So the kid doesn't matter after 18 huh?" Mark asked as he got off the table and paced around.
Ryan just kept looking at him "Mark"
Mark spun around and quickly regretted it "That's not my name"
Ryan smiled a little "Yea it is, your Lilly's son"
Mark just kept looking at him and shook his head.
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Olivia looked over at Cragen "Captain get him out of there"
"Not yet"
"Olivia he is fine, he's keeping his cool" John assured her.
Olivia just kept looking at her husband knowing how horrible he was feeling inside.
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Mark kept looking at his father looking at him "So what if I am?"
"How are you?"
"I'm just peachy" Mark answered with a smile "Enough about me though"
"Why are you interrogating me?"
"I ask the questions not you"
"Why would you lie about your name?"
"The first amendment provides me that right, you know, freedom of speech. Your turn. Why did you have an affair with my mother?"
"Look Mark you were young, your father wasn't a good man"
Mark leaned in closer to him and was face to face with him "Yea, your right. You're not a good man" He whispered.
"What?"
"You knocked my mom up, congrats I'm your son"
"I'm not your father! Your father is a fucking-"
Mark grabbed him by the neck and slammed him to the floor and kept squeezing his neck "You ruined my life! I'm going to kill you!"
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Elliot, John, Fin and Olivia quickly ran out of Cragen's office and into the interrogation room.
Elliot and Fin grabbed Mark and both struggled to pull Mark off as he kept fighthing.
"I'm going to kill you myself!" Mark yelled as they kept pulling him out of room and into the squadroom. "Let go of me!" He ordered.
Elliot and Fin let go of him. "Calm down!" Elliot yelled at him.
"Shut up!" Mark yelled at him as he took the badge off. He punched Olivia's desk as hard as he could with his fist and placed his hands on the back of his neck to try to calm himself down.
Olivia walked over to him "Mark" She whispered.
"Don't. Just don't" He whispered as he tried to control his rage. "Just give me time" He went up the stairs to the crib and closed the door. He placed his head on one of the bunk beds when he heard the door behind him open and close slowly.
"You ok?"
He rolled his eyes recognizing Huang's voice "Do you ever give up?"
"What happened back there?"
"None of your damn business"
"I'm your shrink"
"I don't give a damn if you're the fucking pope. Leave me alone"
"You need to talk about this"
Mark took a deep breath and turned to look at him "I'm not talking"
"You need to"
"No" Mark tried to go to the door but George got in his way.
"This isn't over"
Mark took a deep breath and pulled out the gun he had on his ankle and pushed Huang up against the door. He placed the gun on his forehead. "No. This is finished"
George just looked at him and slowly nodded. "Ok"
"Good. Please move" He said calmly.
"You're not going to do anything stupid are you?"
Mark smirked and cocked the hammer of his gun "Get the fuck out of my way before we both regret it"
George slowly moved out of the way. Mark went out of the room with the gun in his hands. He went down the stairs and headed angrily toward the interrogation room.
"Stop!" Olivia yelled at him seeing the gun in his hands.
Everyone in the squadroom stopped what they were doing and looked over at Olivia.
Mark took a deep breath and kept walking to the interrogation room. Olivia ran over and stood in front of him "Mark it's not ending this way"
"It has to"
"No"
"Get out of my way Olivia" He said calmly. "Trust me"
Olivia gave him a look and moved out of his way.
Mark opened the door to the interrogation room and Fin and John were talking to Ryan "Out!" he ordered.
Fin and John exchanged looks and then both of their eyes fell on the 9 mm in Mark's hands. They slowly got up and left the room.
Mark closed the door to the interrogation room and locked it.
Ryan kept looking at him "You going to kill me in a police station house?"
Mark said nothing and put the gun to Ryan's head.
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Cragen's mouth dropped seeing through the mirror "Oh my god" He went out of his office quickly. "Olivia what the hell is your husband doing!"
Olivia quickly went to the office and watched through the mirror.
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"Kill me if you want but I'm not the one that has children" Ryan said looking at the floor.
Mark pressed the gun to his head more "Look at me!"
Ryan quickly looked up at him.
"Don't you ever talk about my children or those will be the last words out of your fucking mouth"
"Mark you wont get away with this son"
"Don't call me that! You dont have the right to call me that!" Mark grabbed him by his shirt and pulled him up. " Are you scared?"
Ryan just kept looking at him and slowly put his hands up.
"Are you scared daddy?" Mark pushed him against the wall and kept the gun to his head.
"Mark think about your kids"
Mark stuck the gun into his mouth "Any last words?"
Ryan slowly shook his head as tears filled his eyes.
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Cragen looked over at Olivia "Get him the hell out of there"
Olivia just kept looking at Mark. He didn't look like he lost his mind. He had his thinking face on that he always did at work. "He wont do it"
"Olivia he has his father against the wall and a gun in his mouth. I'm not taking chances on this"
"And I'm telling you he wont hurt him. I know my husband better then you captain"
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"Ryan are you scared?" Mark whispered.
Ryan slowly nodded. He mumbled something.
Mark pulled the gun out of his mouth "I'm sorry I didn't hear you. What?"
"I hope your wife was good to you"
"She was. You met her. Olivia Benson. Cute isn't she?" Mark smirked a little and put the gun back on Ryan's chest. "Where do you want it?"
"Chest"
"My pleasure" Mark put the gun to his forehead "Are you hoping this isn't going to happen?"
"Yea. I don't want you to get arrested"
"I wish that nice thought came in play when I was five and went to two foster families. Oh well it didn't" He cocked the hammer of the gun "I really hope you enjoyed your pathetic life"
"I didn't know you were my son!" Ryan yelled out in fear "If I did I would have gotten custody of you myself I swear. Don't do this please!"
"Did you rape Alyssa Moreno?"
"No!"
"You better not be lying to me Ryan."
"I'm not, please, I'm not" Ryan whispered as tears rolled down his cheek.
Mark nodded "Now you know how my mother felt those last two minutes of her life. That's how I felt my whole life until I married my wife of course" He whispered.
Ryan put his head in his hands "Please don't kill me"
Mark chuckled "Ryan I'm a lot of things just ask my wife but a murderer I'm not. Enjoy the rest of your day" He unlocked the door behind him and went out.
The whole SVU squadroom was quiet and just looked at him.
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Olivia looked over at Cragen with a smirk "I told you. I trust him" Olivia went out of the office and walked over to Mark.
Mark put the gun back on his ankle and wrapped his arm around her shoulder "Let's go home"
Olivia grabbed her jacket and walked out with him.
They stood inside the elevator. Olivia just kept looking at him and he kept looking at the ground. "You were never planning to hurt him were you?"
"Of course not." Mark answered as he looked up at her "I just wanted him to know how much he hurt me"
Olivia hugged him and gave him a kiss "You might get lucky tonight"
Mark smiled a little "I'm too tired, I just held a man hostage, I'm sorry" He mocked.
Olivia chuckled and hugged him "I love you"
"I love you too"
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Later that night they were lying in bed. Olivia wasn't asleep but Mark was sort of drifting to sleep. She couldn't sleep thinking that Richard White was still thinking about her, which scared her for Mark and the children.
She felt Mark shift a little and wrap his arm around her waist "Why aren't you sleeping?" He mumbled sleepily.
"How do you know I'm not?"
"Because you just answered me dummy" He gave her a kiss on the cheek. "What's wrong?"
"Nothing"
"I'm a fed, I'm a human lie detector"
"I don't know"
"Dick?"
"What?"
"Suck my dick" He mumbled playfully with a chuckle "Dick is short for Richard so I call him by his personality"
Olivia smirked a little "It freaks me out that he still thinks about me"
"Let him think. Only I can touch" He blew on her neck to cheer her up.
Olivia giggled and pulled her head away "I'm worried about the kids, not me"
"He isn't getting out Olivia" Mark finally opened his eyes "Plus I would never let anything happen to you or our kids, even Lilly who likes to bully me around"
Olivia smiled a little "You let her bully you around"
"It's because she is so cute, it's not my fault" He said in a baby voice as he placed a small kiss on Olivia's temple.
Olivia nodded a little "I'm a mom I have to worry. I don't want our kids in trouble because of our jobs"
"Olivia do you trust me?"
"After today do you even have to ask?"
Mark smirked and rolled his eyes "When I tell you that bastard won't touch a hair on our kids head then you know I'm telling you the truth. I would die for you and the kids, you know that"
Olivia just nodded and gave him kiss "Thanks. I can sleep now"
"Sleep? You have to have sex with me now since you woke me up" Mark teased and slapped her hand "No sleep for you tonight"
"Shut up" Olivia laughed and placed her head on his chest "Goodnight. I love you"
"Love you too" He gave her a kiss on the head and held her close to him.
A/N: Next chapter will have Brad and Casey in it I promise! I didn't want to make this chapter too long so I was only able to put Olivia and mark in it. Please review!