The Butterfly effect {Dean Winchester X OC}

•Prologue•

Milena Singer was only three when she watched her dad kill her mother. It was a normal day for the little girl, playing with her toys while her dad was out back in the yard, working on cars. Milena's mother, Karen, was in the kitchen making lunch for Milena. "Mil, lunch is ready. Can you go get your father."

Milena put her toys down and ran outside to get her dad. Bobby wasn't far in the yard as he was working on one of the many cars that were in the yard. "Dad, dad!" she said, running over to Bobby.

Bobby stopped and opened his arms for Milena to jump into. He picked her up as the two both laughed, "What is it pumpkin?"

"Mommy told me to come get you for lunch."

Bobby put his wrench down on the car and started walking to the house, "Alright, let's go see what mommy made."

The two walked inside and into the kitchen, where Karen was placing their lunch on the table. Bobby placed Milena in her chair. Karen smiled and kissed Milena on her forehead. This would be the last happy memory Milena Singer will ever have of her family together.

That night when Milena was asleep, her parents got into a fight and her mother turned into a demon. She heard a gunshot and woke up, running to the bedroom to see her mother on the floor and her dad with a gun in his hands. A day later, Bobby called one of his friends who knows about this kind of stuff, Rufus Turner. Milena watched as Rufus made a devil's trap. Rufus started the exorcism and the demon inside of Karen started screaming. Milena watched in horror as she watched her mom in pain. Once the demon escaped, Bobby ran over to his wife to check if she was okay. Rufus put his hand on Bobby's shoulder, "I'm sorry, Bobby but she's gone."

Tears started coming down his cheeks as he held his dead wife in his arms. Milena walked downstairs and stood next to her dad, "What happened to mommy?"

Bobby couldn't say anything and grabbed his daughter, holding her tight, "We're gonna be okay."

Milena looked at her mother, pale skin, bloody wounds. A year later, Bobby knew everything about the supernatural and taught his daughter how to handle it and everything she needed to know. A couple years later, a friend of Bobby's, John Winchester, had to stop by for a while with his two sons as he was hunting the demon that killed his wife. Milena met John's two boys.

"Hi, Milena, it's so nice to finally meet you." John said.

Milena hid behind her father as John pushed his two boys inside. Bobby looked down at his daughter, "Hey, Mil, can you show the boys their room while I talk with John."

She nodded and started to walk upstairs while the boys followed. She showed the two their room and she decided to introduce herself, "Hi, I'm Milena."

The youngest Winchester stepped forward, "Hi Milena, I'm Sam and this is my older brother Dean."

The boy next to Sam looked about Milena's age, gave a small wave. Milena felt little butterflies going off in her stomach. Milena didn't know in a couple years that she would grow fond for the boy.