Trinity dies.

The year was almost up. Sam and Dean had been trying everything possible to get her out of her deal but eventually came to the conclusion that there was nothing they could do. They found out that a demon named Lilith held the contract to her deal but Ruby eventually told them all that there was no going back on the deal.

Trinity woke one morning after having a nightmare about the hell hounds.

Sam and Dean loaded up the Impala and Trinity got in too and they headed to the town Lilith was in.

Later that night they found the house and went in with Ruby as back up.

Lilith had possessed a little girl but wasn't inside her anymore.

Lilith possessed Ruby and then Trinity looked to the left saying "Hell hound."
Sam looked to her "Where?"
"There." she said nodded with her head but knew they couldn't see it.

They went into action then. Sam taking her arm and then ran into another room shutting the doors Dean placing his own back against the door to barricade it and keep it shut.

Trinity appreciated it but looked sad "We can't stop this. Ruby said so herself. Sam I'm ready." she said and he snapped at her "Yeah? Well I'm not! I'm not gonna let you go to hell."

"There's nothing you can do. Its gonna happen." Trinity said.

Then Lilith made her presents known. "Your right. It is gonna happen." She used her power to pin Sam and Dean against a wall then she went over and kissed Sam. Then looked to Trinity who was standing alone now. Then she opened the door to let the hell hounds in "Sick her boys." she grinned
"Noo!" Sam and Dean yelled at the same time.
The hell hounds went right for Trinity and she vowed not to scream. The hounds lunged and had her on the floor now and each of them bit and scratched til the blood erupted from her body and Sam turned him head away not able to bare watching the hell hounds tear her apart and Dean was suffering just as much. Neither of them could watched.

Then Lilith tried to kill Sam but when that didn't work she went away.

Dean found himself free first and he went over to Trinity tears falling from his eyes and then Sam was free and he ran to her pulling her into his embrace once he realized she was dead "Nooo. Please. No, I'm not ready." he said his voice rough with his tears and then he just started to rock her in his arms as he cried and Dean went down on his knee's and cried for the little sister who had never even had a chance to grow up and be an adult.
And Sam looked shattered and he knew that he had just lost something very precious to his heart. He blamed himself for not being able to find a way to break the deal and could feel the lose down to the pit of his soul.

One week later:

The brothers parted ways deciding not to hunt anymore because it had already cost them too much. First their dad and now their sister.

Dean met a woman named Piper who he decided to settle down with and Sam found Ruby in a new body and practiced with his powers.

TBC................