Author's Note: I have changed a few details for the purpose of this novel. Here is some extra information to help you understand.
-Sam and Dean have stopped hunting.
-All of the characters that have died in the seasons, are still dead.
-Dean was married to a girl named Kathryn Jacobs.
-They had two boys, John and Robert (named after John Winchester and Bobby Singer).
-Kathryn never knew the full extent of what the siblings did, but she did know the basics like protection against the supernatural (salt lines, devil's traps, etc).
-When John was 6, his mother, Kathryn, was driving him home from school when they were involved in a car accident. Sam found the car wrecked at the side of the road and was horrified to find them dead.
-Robert was only 6 months old when his mother died.
-Grief stricken, Dean tried to make a demon deal to bring them back to life. The crossroads demon refused, but instead offered him the chance to bring back John in exchange for his soul. Knowing that Kathryn would want him to save their son over her, he accepted the deal. The crossroads demon gave him two years before he would return for Dean's soul.
-John is now 8 and Robert is 2.
-John knows about the supernatural, Robert doesn't.
Dean was crouched in front of his two sons. "Be good for Uncle Sam."
Robert nodded. "I will Daddy." He smiled.
Dean knew that Robert was too young to understand what was going on. Wiping away a tear with the back of his hand, he turned to his oldest son, John. "You gotta' be brave."
John nodded tearfully. "Don't worry Dad, I'll watch out for Robert." He stated in a quiet, tearful tone.
Dean smiled softly before pulling John into a hug. Dean tried to hold back tears himself as he rested his head lightly on his sons shoulder knowing that this was probably the last time he would ever see him. Pulling away, he then wrapped his arms around Robert. Running a hand through his brown curly hair, it reminded Dean of Sam's hair from when he was around Robert's age.
Sam walked into the room with a sorrow filled expression.
"Uncle Sammy!" Exclaimed Robert as he ran over to him and wrapped his arms around Sam's legs.
Sam simply ruffled Robert's hair before looking back at his older brother.
"Robert..." John wiped away tears before walking over to his little brother and lifting him up into his arms. "Why don't we go and play upstairs?" Knowing that his father needed time alone with his little brother, John walked off with Robert.
The brothers heard the door opening.
Turning, Crowley entered the room.
"You can't just come barging in here!" Sam stated in an aggressive tone.
"Actually, Moose, I can. Dean made a deal, and as you probably know, it expires today. I'm just here to collect him." Crowley stated.
"Ok, you win. What do I have to do?" Asked Sam.
Crowley furrowed an eyebrow. "What do you mean?"
"To save Dean." Sam replied. "What do you need me to do?"
Dean grabbed Sam from behind in an attempt to turn him round. "What the hell do you think you're doing?"
Sam pulled loose from Dean. "Just shut up for a second."
"A deal is a deal, you can't go back on it now." Crowley stated.
"Well, there's gotta be something. There's gotta be some way, whatever it is, I'll do it." Sam explained.
Dean grabbed Sam once again.
"Don't, Dean! You can't leave John and Robert, they've already lost enough!" Sam shouted. "I'm not gonna let you go to hell, Dean!"
"Yes, you are!" Dean stated.
Sam and Dean both looked at each other.
"Yes, you are." Dean's tone was now calmer. "I'm sorry. I mean this is all my fault, I know that. But what you're doing, it's not gonna save me."
Sam stared at his big brother, tears building in his eyes. "Then, what am I supposed to do?"
"Keep fighting." Dean looked at his little brother. "Take care of yourself, look after my boys, and my wheels." He sighed. "Just remember what Dad taught you...okay? And remember what I taught you."
Sam threw his arms around him as tears ran down his cheeks.
As the clock struck 12, the Winchester brothers turned to Crowley.
"Ready?" He asked.
Dean smiled at Sam one last time before nodding.
In a flash, Crowley was gone, Dean along with him.