Rizzoli and Isles and Grey's Anatomy Cross-over.

Disclaimer: I do not own Grey's Anatomy or Rizzoli and Isles but I wish I did.

"Did you know.."

"That 11% of the world's population is left handed? Or that bears have 42 teeth? Or that the average person falls asleep in 7 minutes? Yes Maura, I know both of these things. You've already told me at least a million times today, and I'm not an average person because you keep waking me up every five minutes to tell me lots of random facts, most facts I already know because you keep telling me them over and over again" groaned Jane Rizzoli and she turned her head and went back to sleep.

Maura pouted and crossed her arms across her chest. She and her best friend, Jane Rizzoli, were on their way to Seattle to meet Maura's long lost sister. According to her biological father, she has a long lost sister who's a doctor at Seattle Grace Mercy West Hospital who knows she's adopted, but has yet to meet her biological parents. Maura was also nervous; she was going to meet someone from her real family and by the sounds of it, was quite accomplished in her job. Maura looked down at her hands and realized she was turning the ring around on her finger without realizing it. She groaned lightly and laid her head on the back of the chair. She was twisting her ring and thats what her biological father did, her crime boss biological father, Patrick Doyle. In all the times that they'd met, he had always been somewhat nice to her and she was the only one he would never hurt, he had also saved her life twice and made it clear to the rest of the crime mob that if they even tried to hurt her, they'd be dead. Maura sighed again, she was still so nervous and being on this plane was making it worse, she just wanted to get to Seattle and meet her long lost sister. She felt movement and looked down to see Jane squeezing her hand; she turned her head and smiled tearfully at her best friend.

"Maura, she's going to love you. Who doesn't? You're the most amazing and determined person I have ever met".

/GREYS/RIZZOLI AND ISLES/

"Babe, just come and sit down, please. Your pacing is giving me a headache" said Calliope Torres as she stared at her wife as she paced in front of her in the oncall room, mumbling to herself.

"Calliope, I can't calm down. My long lost sister is coming to town to meet me. I freaked when Mom and dad told me I was adopted, freaked out even more when they told me my biological father was a mob boss but I slightly calmed down a bit when I found out I had a doctor as a long lost sister. But ahh. Calliope, what am I going to do if she doesn't like me? Or worse, doesn't like you or Sofia? You're my family and you're my everything and my life". Said Arizona as she mumbled the last part of the sentence, going slightly insane.

"Babe, come here". Said Calliope had she held her hands out to her wife. Arizona sighed and took Calliope's hands; Calliope pulled her wife closer and brought her to sit on her lap. Arizona wrapped her arms around her wife's neck and relaxed into her.

"Everything's going to be okay. She's going to love you, love me and she's going to love Sofia. I've done some research on her, well, some google research anyways and she's a medical examiner but her research and stuff has been published in a lot of journals, just like you. She sounds so incredibly smart, just like you and I was being very serious, you two look alike" said Calliope softly as she rubbed her wifes back.

Arizona nodded her head; she knew Calliope was right but she was scared, but then again, meeting someone you've only just found out was your sister is freaking scary. Arizona stared at the wall not paying any attention to anything that was going on around her, when she found out she was adopted, all hell broke loose.

Flash back

"Mum, why is that when daddy needed a liver transplant and I wasn't a biological match, I am quite a smart person, I am a doctor afterall, and I know when things shouldn't be what they should be you know? And like I know why but I don't want to admit why, so please tell me Im wrong" said Arizona softly as she stared at her mum lightly before turning her gaze back to her dad and going back to pacing in front of her dad in the hospital bed and her mother in the chair. Her father, the general, had come in for a liver transplant and Arizona found out she wasn't a match.

"Zonie, we couldn't tell you. You would feel shattered knowing we weren't your parents and feel even more shattered knowing Tim wasn't your brother". She said softly as she looked at her daughter.

"Mum, explain it to me. Now" Arizona said softly.

"We never told either of youse this but when I had Tim, there were complications and the doctor said I could never have any more children, and we wanted another one, so we adopted you. It was the best decision we ever made". She replied tearfully. Arizona stared at her mother and then back to her father. Lies, they had all been lying to her. She didn't have a family, who was her real family?

"You lied to me. YOU BOTH LIED TO ME. Neither of you are my parents!". Yelled Arizona tearfully as she took one last look at the people she called parents before shaking her head softly and walking out, not looking back once.

"I love you Arizona" whispered Calliope softly.

"I love you too".

/GREYS/RIZZOLI AND ISLES/

"Maura?". Asked Jane as she looked at her best friend who was staring absent mindedly out the window, Maura sighed and turned her head towards Jane.

"Yeah?". She asked softly.

"Do you remember when you found out that you had a long lost sister?". Asked Jane. Maura smiled lightly and nodded, she remembered quite well.

Flashback

"Maura, I need to show you something" started Patrick as he sat up in his hospital bed lightly. After being shot and falling a few feet, he had been injured and was in the hospital for quite a long time.

"Okay...". said Maura softly. Patrick reached into his wallet and Maura seen the photos of her, but instead of showing her more photos of herself, he handed her the side she hadn't seen. She took the wallet carefully and looked inside to find a beautiful blue eyed blonde haired girl. Maura touched the photo and she could see the resemblance, they both had the same eyes.

"Who's she?". Maura asked softly.

"That's your sister. You have a sister in Seattle called Arizona Robbins, she's a paediatric surgeon". Said Patrick softly.

"I have a sister?". Whispered Maura softly. She had a family member who wasn't a criminal? Wow. That had to be the best thing she had heard all week.

End flash back.

"Yeah of course I remember, what about it?". Maura asked curiously.

"You came to me so excited because there was someone in your family who wasn't a criminal you looked like Christmas had come at once". Laughed Jane. Maura laughed, she did look like Christmas had come early.

"I did, but you would too if two people in your four person family were mob people" said Maura softly.

"But now its two in five. And two of the others a doctors, one of them is a pretty damn awesome medical examiner by the way, pretty good odds don't you think?". Asked Jane.

"Very good odds".

/GREYS/RIZZOLI AND ISLES/

"Babe? Do you remember when she rang you to tell you?". Asked Calliope softly as she rubbed her wifes back.

"Ahuh, I came running into the room to tell you".

Flash back.

"CALLIOPE! WHERE ARE YOU?". Yelled Arizona as she ran into the apartment that they owned.

"Bathroom babe" her wife called back. Arizona flung her jacket and purse on the lounge before running into their ensuite, slipping off her shoes in the process.

"You will never guess what happened tonight!". Arizona said softly as she walked into the bathroom where her wife was having a bubble bath.

"And what happened tonight babe?". Asked Calliope softly. Arizona started to pace in front of the bathtub.

"Well, I was about to leave and then I get a phone call from the front desk saying I had a phone call from someone in Boston, I mean crazy right, I don't know anyone in Boston.. So I answer the phone and it's a Dr Maura Isles, she's the Chief medical examiner of the boston police department and she tells me we have the same father, and I mean, I've got my adoption details and mum told me about what my dad looked like and so I like put two and two together and realized she was correct and that we were sisters so I invited her to come to Seattle. On impulse, crazy right?". Asked Arizona as she stopped pacing and stood in front of the tub. Calliope raised her eyebrow staring at her wife.

"Wait, let me get this straight, you received a phone call, from this woman who said she was your sister and you've invited her to come to Seattle?". Asked Calliope, trying to re-confirm the story she was just told.

"Yes! Crazy right?". Grinned Arizona. Calliope grinned in reply.

"Very crazy, you want to know what else is crazy?". Asked Calliope with a twinkle in her eyes.

"What?". Asked Arizona curiously.

"This!". Grinned Calliope as she reached out, grinning, and pulled her wife fully clothed into the bathtub with her.

"CALLIOPE!". Squealed Arizona as she landed in the tub, sending bubbles flying. She came up sputtering and coughing up bubbles from the bubble bath she wiped them away from her face and from her eyes before narrowing her eyes at her wife. Calliope grinned as she shrugged her shoulders.

"Told you it was something else crazy".

End flash back.

"Of course I remember, you got me soaked!". Laughed Arizona softly as she kissed the top of Calliope's head.

"Well, that day was one of the happiest it'd ever seen you, and if she could do that with only one phone call, I can only imagine what a visit face to face could do". Smiled Calliope as she looked up at her wife; Arizona smiled down at Calliope before placing her hand on Calliope's cheek and tracing it with her thumb softly.

"You're so beautiful". She whispered as she placed a soft, warm kiss on Calliope's lips. Calliope grinned into the kiss before deepening it lightly by turning the duo around and pegging Arizona to the bed underneath her. Their hands travelled each other's bodies, moaning in pleasure. The silence was ruined by the beeping of a pager. The duo groaned knowing one of them either had a patient or a surgery to get to. Calliope climbed up off Arizona and grabbed her pager.

"Not mine". Said Calliope with a grin.

"Must be mine then". Sighed Arizona as she reached for her pager, but a smile came up over her face.

"Good case then?". Asked Calliope, loving the way her wife smiled, her dimples were just too damn cute. Arizona shook her head lightly.

"Nope, even better, Maura's here".

I love both of these shows and I thought why not join two of the shows that I love into one fic? Enjoy and read and review please! Rizzoli and Isles is set during season 3, and Grey's Anatomy is set mid season 8.

And well, I had this little idea in my head, and we all know that (well those of us that are Jessica Capshaw fans) know that Sasha Alexander who plays Maura Isles looks exactly the same as Jessica Capshaw, so I thought it'd do a fic of them becoming sisters.

So read and review please!