Prologue:

A young 4 year turtle named Leonardo was laying on the floor in front of the TV watching his favorite TV show of Space Heroes. His mommy and daddy were bringing home his new little sister and he can't wait to meet her. She was going to be human unlike him but he'll love her as his own sister.

He was stuck with a babysitter but he didn't mind, his babysitter was very nice to him and she made the best pizza ever. Her name is Angel and she was Leo's best friend and he look at her like a big sister.

"Hey sis! When do you think mommy and daddy will be here with my new baby sister?" young Leo asked Angel with a big smile that could light up a room.

"Haha! Not much longer Leo, ya just have to be patient and they'll be here before ya know it!" Angel said as she rubbed Leo's head which made him smile more.

"I really can't wait to be a big brother! I'm gonna protect her! Like how you protect me Angel!" Leo said with a determined voice and face that made Angel smile.

"That's right Leo. As a big brother you have to protect your younger sister and make sure she's safe and happy. I know you'll be a great brother Leo." Angel said with a sincere voice that made Leo happier.

They heard the front door opening and Leo ran toward to the door to grant his parents and new sister.

Leo's parents are pretty different from the "normal parents". Leo's mother is human, but his father is a giant rat. Even though Splinter is a rat, he is well respected among everyone and he has his own dojo. Leo wants to be a great martial artist like his father.

Leo's mother is a housewife. She also helps out anyone in need that can't afford medical treatment. Tang-Shin used to be a nurse, but she decided that she wanted to stay home with her song and new daughter.

Splinter and Tan-Shin walked into their home with a new bundle with them. Tang-Shin is holding a toddler in a yellow blanket.

"Mommy, daddy! Welcome home!" Leo said smiling at his parents.

Splinter and Tang-Shin looked at their son with a smile.

"Hello sweetheart! I take it you and Angel had a good time while were away?" Tang-Shin asked her son with a smile.

"Yes mommy! We watched Space heroes, played ninja master, and she made me my favorite pizza!" Leo said with smile as Angel walked in.

"Yeah and I made sure he ate some salad as well Mrs. Hamato not just pizza." Angel said as she rubbed Leo's head.

"Yeah and it was icky!" Leo said as he made a face.

Everyone laughed at him except the young child in the yellow blanket.

Leo noticed the child in his mother's arms and he walked over to his mother to try to take a closer look.

"Is that my new sister mommy?" Leo asked with excitement and nervousness.

Tang-Shin smiled at her son and kneeled down to his level with the young girl in her arms for him to see her better.

"My son…meet your new baby sister…April Hamato. She's 1 years old." Tang-Shin said with a smile on her face as she watched her son look at his new sister.

April had orange hair, pretty blue eyes, and franklins on her cheeks.

April noticed Leo and she moved her hand to his face to touch him and Leo let her. April just smiled as she touched her new brother's face which made Leo happy.

"She likes me mommy. I'm so happy. She's also very pretty mommy!" Leo said as he got closer to hug his new sister and April let him which made everyone smile and go 'awww'.

"I'm going to be the bestest big brother ever!" Leo said with a smile as he hugged April closer.

"I know you will my son. I know deep in my heart you'll protect and love your sister very much." Splinter said as he rubbed his son's head with love.

Tang-Shin looked at the clock as she washed the dishes they used for their dinner; it was 9:30 p.m. which meant it was the kids bedtime.

"Leo! It's time for you and April's bedtime!" Tang-Shin said as she wiped the water on her apron as she walked into the living room.

Splinter was playing with his kids as well and gave his wife a loving smile.

"Oh! Can we please stay up a little longer mommy?" Leo asked with a sweet voice and used his big puppy eyes on her like his friend Mikey did at school with the teachers.

"I'm sorry sweetie but its way past your bedtime, and you and April need your rest. You want to grow up big and strong like your daddy, don't you baby?" Tang-Shin asked her son.

"Yes I want to be big and strong like daddy to protect you and April." Leo said with determined face as he got up from the floor.

"Night, night daddy! I'm gonna go get ready for bed!" Leo said as he rushed off to get ready.

Tang-Shin and Splinter just laughed at their son. April just kept playing with her blocks not knowing what's going on.

"Come on sweetheart; let's get you ready for bed." Tang-Shin said as she picked up her new daughter. April yawned and rubs her eye sleepily.

Tang-Shin just smiled at her little girl and carried her toward Leo's room where they were sharing.

Tang-Shin just put April in her crib when Leo came in his Space Heroes PJ's. Tang-Shin just smiled at her baby boy as she walked toward him and kneeled down to his level.

"Did you brush your teeth?" Tang-Shin asked her son and he nodded with a huge smile on his face.

"That's my good boy. Now let's get you to bed." She said as she watched her son nearly jumped into his bed which made her laugh.

"Mommy, can you tell me a bedtime story?" Leo asked with a sweet voice that no one can resist.

"Of course sweetheart. What story would you like me to tell you?" She asked looking through her son's bookshelf for a story.

"Could you tell me the story of your friend? The one who uh…." Leo tried to say but he couldn't figure out how.

"Oh! You mean the story of Auntie Martha that ran away, is that right sweetheart?"

Leo nodded with a smile.

"Why do you want me to tell you that story sweetheart?"

"Well…I miss Auntie Martha and mommy never told me what happened. Just that she had to go somewhere far away. Can you please tell me mommy." Leo asked with big blue eyes.

Tang-Shin sighed as she looked at her son. He was pretty smart for a 4 year old.

"Okay sweetheart…you're a big boy now and I guess it's time you hear about Auntie Martha…" She said as she tucked her son in so he can get comfortable.

"Well…about a year ago, Auntie Martha was having a normal day at school. Your Auntie was training to become a nurse so she can help out everyone that got booboo's or got very sick. Well, one day she was on her way home from school and she meet this young man but he was on the ground. He had a very serious booboo. Auntie Martha was very worried about the man and she told him she was going to call 911 for him but he told her no. Auntie didn't want to leave the poor man alone so she brought him home to try to heal him-"

"Why didn't the man want Auntie Martha to get him help mommy?" Leo interrupted his mother.

"Well sweetheart…Auntie Martha didn't tell mommy much. All she said was that he didn't want people to worry or to know. Do you want me to continue?" She asked with a sweet voice.

Leo nodded.

"Okay…well Auntie Martha took him to her home to care for him. Now he's booboo's were very serious so it took a while for him to get better. She cared for him for about 3 months. That's how bad his booboo's were. Over the time that Auntie was taking care of his booboo's, she started to fall in love with him and he started to fall in love with her as well. Then the man gotten better, he's booboo's were completely gone thanks to Auntie's love. Even though the man was healed and wasn't staying with Auntie anymore, he still came by to see her. They were happy for a while but…Auntie's parents found out and they didn't like the man that she fell in love with."

"Why didn't they like him mommy?" Leo asked interrupting his mother again.

"Because sweetheart the man was into something that's not very nice, and Auntie Martha's parents forbidden her to be with him anymore."

"What does 'for-b-bid-den' mean mommy?"

"It means it's a no, no. That you can't do that. But…your Auntie didn't listen. She loved the man more than anything and she went against her parents. So…Auntie and the man moved far away…not tell her parents goodbye, but she did tell mommy goodbye. And ever since then…Auntie's been with her true love ever since." She said wiping a little tear away from her eye.

"Mommy…why did Auntie fall in love with a person that made everyone sad?" Leo asked not liking that his mother was crying.

"Well sweetheart…she didn't plan on falling in love. You don't plan on it. It sometimes happens. And like I always say…'You can't help who you fall in love with.'" She said with a sincere smile.

"B-But don't you miss Auntie mommy? Why didn't you stop her?" Leo asked near tears as well.

"Because sweetheart…no matter how much I wanted Auntie to stay…I knew she would be unhappy if she's not with the one she loves. Sometimes people have to do things that don't like to see that one person we care about happy, even though we ourselves aren't happy with their decisions. So…I don't regret my decision in supporting Auntie. Do you understand Leo?" She asked he son.

"Kinda…but…not a lot…Is Auntie happy mommy?"

"Yes sweetheart…she's very happy. Auntie sent me a postcard and she told me she's so happy that she could sing. You'll understand once you get a little bit older honey…now…you need to get some rest sweetheart." She said when she noticed Leo rubbed his eye.

"YAWN! Okay mommy…I'm glad…Auntie is…happy…" Leo said and fell asleep.

Tang-Shin smiled and kissed his forehead and got up to leave. She looked back at her son with smile.

"You'll understand someday sweetheart…when your little sister falls in love…or when you fall in love…" Tang-Shin said as he turned off the light and walked off to her and Splinters bedroom not knowing that life was going to get more complicated.