Authors Note: Hola. This is my first Rizzoli & Isles fanfic. But this is not my first time writing fan fictions, I used to write CSI:NY fan fictions on my SMackedHard account. Feel free to check them out if you wish. I randomly thought of this idea for this story and thought it would be really cool to write. Please, tell me what you think and leave me a review. I appreciate it. Also, me and my friend, SashaSupporter on Twitter, pretend to be Jane and Maura, just for fun. I'm Jane and she's Maura. Follow us if you want: Jane_Rizzoli1 and Maura_Isles1 . I kind of based this off the book, Body Double, by Tess Gerritsen but I changed some of it. But doing that account actually gave me a lot of inspiration so if you want, follow us. Hehe.

Disclaimer: I do not own these characters, all the credit goes to Tess Gerritsen and everyone at the TV show. Most of this story is my idea and work.

Rating: T

Secrets

Chapter 1:

It was a beautiful sunny Saturday in Boston. Everyone was excited about this day; especially Dr. Maura Isles and Detective Jane Rizzoli, since it was the nicest day the city had in months. Maura is the chief medical examiner of the Boston Crime Lab and Jane is a detective; the only female detective in the unit, in fact. It was their day off, unless a case popped up.

"Come on, Jane! We can go to a yoga class and clear our minds." Maura said with a big smile as she sipped her coffee.

"At 6 in the morning, Maura? No! Nuh uh." Jane said as her friend frowned. "What?"

"You were SO excited when you went yesterday. What happened to all that excitement?" Maura asked with a smirk.

"Yesterday, I had nothing else to do and besides, I wanted to talk to you. And as for the excitement, it's slowly being drained away." Jane said with a wink.

"Drained away by what?" Maura asked and Jane pointed to her pants and gave her an annoyed look.

"Oh…", Maura's eyes widened. "Oh! I see. That's unfortunate. I'm being drained too." Maura said with a wink. "I understand your pain, Jane."

"How can you even be smiling?" Jane said in a shocked tone. "It feels like someone is stabbing me down there."

"It's not that way for me." Maura said as she watched her friend let out a groan.

While she placed her hands on her pelvic area, she said, "You're damn lucky!"

"Let's go for a walk. Physical activity can help cramps go away." Maura said as she finished her coffee and threw it in the trash can.

"No! I had no idea." Jane said sarcastically. "What kind of physical activity?" Jane winked.

"Any kind." Maura returned a wink.

"Let's go now before someone calls us with a case." Jane said as she started to walk toward the door.

"You're going to run in your work clothes?" Maura asked surprisingly.

"Well, if someone calls us in, I'll look dumb with sweat pants on." Jane said as she walked back over to her friend.

"Come on! You can borrow a pair of mine." Maura said as she opened up her desk drawer. It had all sorts of shirts, pants and all sorts of clothes folded neatly inside it.

"Really? You have clothes in your drawer?" Jane asked and shook her head and laughed.

"It can come in handy once in a while," Maura said as she pulled out a pair of sweat pants. "See, if you were prepared, I wouldn't be supplying you with clothes right now."

"I'm sorry, Maura. I really am. I'll make sure to next time," Jane said with a wink as Maura handed her the pants. "You wouldn't by chance have an extra pair of sneakers, would you?" Jane asked as she took off her work pants and put on Maura's. When she looked back up, Maura held out a pair of sneakers in front of her with a big grin.

"I saw that coming." Jane said as she took the shoes and tried them on. "Wow. Same size. Thank you."

"You're welcome." Maura said as she changed into her running clothes. "So, how was your date with Joe Grant?" Maura's voice echoed across the room.

"Shh!" Jane said and Maura mouthed sorry to her. "It was…fun."

Jane started to walk away and Maura ran in front of her. "And?" Maura said with a smile.

"And what?" Jane asked with a weird look.

"Did you guys…you know?" Maura asked with a wink.

"No! No. Why would we? It was our first date and just because we're going out doesn't mean-" Jane rambled on as Maura kept smiling at her. "Okay! We did!"

Maura's mouth dropped. "No wonder you didn't answer my texts."

"We didn't plan on it…I didn't anyway." Jane said with a shrug of her shoulders.

"Love isn't planned, Jane." Maura said with a smile.

"I don't think I love him…yet." Jane said as they walked out of the morgue.

"That can all change." Maura said and poked her on the side."

"Don't poke me! You know I don't like that." Jane poked Maura and they both laughed.

As they made their way up the stairs, they heard people singing, "Jane's got a boyfriend!".

Jane looked around the corner and saw Frost and Korsak joking around. That was a first for them, since t they're always on each other's backs. Jane glared at Maura.

"You didn't, Maura…" Jane said with a frown.

"I didn't!" Maura said in shock. "Well…"

"Well…what?" Jane's mouth dropped.

"They may have possibly heard me talking to you on the phone last night." Maura said sadly.

"Great, now they'll never leave me alone. Let's go the other way." Jane said as she grabbed Maura's hand and went toward the back exit.

"You'll have to face them sometime." Maura said as they got outside.

"I know, but not right now. Maybe they'll even forget." Jane said with a smile.

"I doubt they will, Jane." Maura told her as they started to run.

"A girl can dream, can't she?" Jane said with a smile as they started to laugh.

Just a few blocks away, Lindsay Hunter was walking home from her best friend's house. They only lived a few houses away so they were always at each others house. Lindsay smiled widely as she looked up at the baby blue sky, as her cherry blonde hair bounced in the breeze. Finally, a nice day. She thought and got out her house key. As she stood on the sidewalk, she noticed a car in the driveway behind her mom's car. It wasn't a car she knew. That's odd. I wonder who's here.

Next door, she saw her next door neighbor, Mrs. Winters staring at her cautiously. She was a very polite lady with curly white hair. "Who's car is that, Lindsay?"

"I have no idea, Mrs. Winters. I'm about to find out. Have a nice night." Lindsay said politely and gave a little wave.

"You too, sweetheart." Mrs. Winters said and walked back into her house.

Lindsay stuck the key in the lock, it clicked and she walked inside, only to be grabbed by her hoodie. She screamed instinctively as the door was slammed behind her.

"I wouldn't do that if I were you, missy." the man that held her by the hood of her hoodie told her. He wore a ski mask.

"What do you want from me?" Lindsay tried to ask calmly but was too overwhelmed with her emotions to remain calm. While looking around, she saw her mom bound up in ropes and duck tape over her mouth. "Mom!"

"It's simple…" Lindsay heard a voice. "I don't ask for much."

"Who's there?" Lindsay asked, looking around for the voice.

A woman stepped out from behind the living room wall. She had light brown hair and was wearing clothes that someone from jail would wear. She instantly knew who she was.

"Mom?" Lindsay asked as her jaw dropped. "But…how?"

"It's been a long time, hasn't it?" Lindsay's real mom walked toward her. "My my, you look more like me every single day." She put a hand up to Lindsay's face.

"Don't touch me." Lindsay slammed her mother's hand down. "What do you want? And why did you tie up my mom?"

"I'll get to that in a moment. And she's not even your real mother. She's your foster mother." her real mother walked closer to her. "I'M your real mother."

"I don't want to have anything to do with you. You're a monster!" Lindsay yelled and tried to kick her mother but the masked man held her tightly by the arms. Lindsay then spit into her mothers face.

She wiped off the spit. "Is that a way to treat your mother?" She said and looked the man in the eyes. "Let her go."

"But she'll-" he started to say.

"I said let her go! If she even thinks about it, she must not be as smart as I thought she was." she said with a smile. "Speaking of smart, what are your grades?"

Why is she making small talk with me? Lindsay thought and said, "Straight A's." She stared at the floor, avoiding her real mother's gaze.

"Good. I'm proud. Well, here's why I'm here. Remember the last time I gave you a visit?" her mother asked her with an evil smile.

Of course she did. She remembered it perfectly. She was 12 years old at the time. Lindsay remembers running in from school. Her foster mom started letting her stay home alone but only for a few hours, since she would get home from work in 3 hours. Lindsay was confused when she turned the knob and it was open.

"Hello?" Lindsay asked, her voice echoed across the room. "Mom? Are you home early?"

"Yes I am." a woman said and jumped out from behind the wall. She had a large steak knife in her gloved hands. "Did you miss me?"

"Who are you?" Lindsay asked. She didn't know what to think. She thought it would be so cool to stay home alone and look what happened.

"I come all this way and you have no idea who I am? That's a shame." the woman said and came closer to her.

Lindsay leaned back instinctively. "Please, leave me alone. Please, leave." She fell to her knees and started to cry.

"I thought you were stronger than that." the woman said. "You REALLY don't have a clue who I am?"

Through the tears, Lindsay managed to say. "No."

"I am your mother." the woman said with a huge smile.

Lindsay looked up with tears pouring down her face and she shook her head. "No. My mother is at work. She's going to be home-"

"That's your FOSTER mother. That's not your real mother. I am." the woman said it proudly.

"But she…she never…" Lindsay started to say. She was so confused. Had her mother lied to her this whole time?

"She never told you?" the woman said as she circled her. "I'm sure any good mother, even a foster one, wouldn't want to tell you about me."

Lindsay couldn't believe it. Her mother did lie to her. For 12 years of her life, to only find out now that she's not even her real mother. Come to think of it, they looked nothing alike.

"What's so bad about you?" Lindsay tried to remain calm.

"What's so bad about me?" the woman held the knife in front of Lindsay's eyes. "What could possibly be wrong with me? I broke into someone's house and I'm carrying a knife with gloves on. What could possibly be wrong?"

"Are you a…killer?" Lindsay asked in a shocked tone. It was getting stranger and stranger by the minute.

"BINGO!" the woman yelled and scared Lindsay. "You finally put all the pieces together but I knew you would because you're a genius."

Lindsay didn't like to show it off but she was really smart. She was the top of her class even.

"What are you gonna do to me?" Lindsay asked as she wiped the tears away. Crying wouldn't get her out of this mess. If she could maybe get to a telephone, she could call 911.

"It's very simple. You see, I've killed lots of people. I'm not afraid to admit that." the woman started to explain. "It's kind of…a family business, if you want to call it that. And I want to see if you got what it takes…"

"So…you want me to…kill someone?" Lindsay asked.

"Way to state the obvious…" the woman said with a shake of her head. "YES. I WANT YOU TO KILL SOMEONE." The anger scared Lindsay. "Sorry about that. But, you see your dog over there?"

She did. It was their golden retriever, Buddy, sleeping peacefully on the couch.

"I want you to kill your dog." the woman said with a smile. "It's not that hard and it's only a dog."

"Only a dog?" Lindsay said in a shocked tone. "He's alive. How can you even kill someone that's alive?" None of this made sense to Lindsay. Maybe she was dreaming. She pinched herself to wake up. It wasn't a dream after all.

"I don't like people. I'll admit that. But there's something about watching the life slip from someone's body…you get what I'm saying?" the woman asked her.

"No! I don't get what you're saying." Lindsay said in anger.

"I should have known…you're just like your sister." the woman said as she kicked the wall.

"I don't have a sister…" Lindsay said in a confused tone.

"Oh, but you do. You see, she didn't just lie to you about me. She also lied about your sister, Maura." the woman said with a smile. "I could tell right when I gave birth to her that she wouldn't be capable of this," she traced her finger along the blade of the knife. "so I put her into adoption."

"But that was your daughter! How could you-" Lindsay started to say but the woman stopped her.

"I won't have a weak person in my family. I thought you weren't weak, but I was wrong." the woman grabbed Lindsay by the shirt and stood her up. "You're first and then I'm going to get your sister."

"No!" Lindsay screamed and kicked her mother's leg and she fell down. Quickly, Lindsay ran out into the kitchen and picked up the phone and dialed 911. She didn't get to talk to the police however but the phone was still on so the police could hear everything. Lindsay was grabbed my her shirt and thrown to the ground. Lindsay screamed as loud as she could.

"911...what is your emergency?" she heard a woman say.

"I gave you a chance…and you didn't use it." her mother said and brought the knife to Lindsay's throat. "Any last words?"

"Rot in hell!" Lindsay screamed as her mother cut the right side of her throat and blood oozed out. Lindsay started to cough. Her mother stood up and watched her bleed.

Seconds later, police stormed into the house and arrested her mother and took Lindsay to the hospital. The police were looking for her mother for a long time and were glad they found her.

Lindsay zoomed out of her reverie. She felt the scar on her throat.

"Yes…I remember." Lindsay said with a straight face.

"Good. Then you should know what I'm going to ask you to do, right?" her mother nodded her to head to her foster mother bound up in ropes. She let out a few groans and shook her head. "Don't you want to kill her for lying to you about me? And lying to me about that sister you never met?"

Lindsay shook her head. "How did you get out of jail?"

"I have my ways, but that didn't answer my question." her mother said. "I should have known when I stepped into this house you weren't going to cooperate with me. Patrick, can you please take her mother downstairs?"

Lindsay's eye widened as the mask man roughly pulled her mother up from the ground and took her down into the basement. "No! Please, don't hurt her!"

"This is your last chance, Lindsay. Are you going to do it or not?" her mother asked her with a frown.

"No!" Lindsay screamed as her mother grabbed her by the hood and led her down to the basement. "It would've been better if you did it yourself because now you have to watch this."

At that moment, the man started assaulting her mother as she tried to fight him off. Lindsay tried to turn away but her mother held her head forward. "This is your fault. You're going to watch." Lindsay started to scream and her mother covered her mouth. The man stabbed her mother in the stomach multiple times and Lindsay watched as her mother's eyes closed.

"Mom!" Lindsay cried as she was led back upstairs. The tears were pouring down her cheeks.

In the distance, they heard all heard sirens. Lindsay felt a ping of hope when all of a sudden, her mother stabbed her two times in the chest. Lindsay fell the ground, gripping her stomach.

"Your sister is next!" she yelled as both her mom and the man ran out the back door.

A male officer ran in and assisted her. Other officers ran through the house. One yelled, "I found a body!"

"You're going to be alright, okay?" the officer asked and Lindsay's eyes fluttered and shut.