wait. I have a twin?

The sacrifice.

"KAYLA!!" The men ran up after her but were too late to catch her. "No!!" Cas growled before he touched Deans and Sams shoulders before taking them to hell to catch her before it's too late. 

~~In Hell~~

Cas, Dean and Sam appeared before they were attacked by more than 6 demons. Castiel blasted of 4 of them while Dean and Sam took out one each. Orange lights flickered in  the demons eyes and mouth while screaming in agony and collapse onto the ground. 

"Kayla should be here any minute. I want you 2 to grab her and take her out of here while I finish up Lucifer" 

A rumbling sound came from afar. the gate had been opened. 

"She's here!" Cas added on as a matter of fact.

Screams and grunts of pain and anguish were heard after a while. Kayla was slaying down every Demon that came in her way. She came across her brothers and Cas "Sonsofbitches!" She grumbled "don't make me put you to sleep!!" she said walking up to them with a glare. 

"we're not! come with us!" Dean said in an order tone before lifting her up in a firemans lift. 

"Sammy let's go!!" Dean finished up before he went up to hells gate while Kayla was punching Deans back to let her 

"DEAN!! LET!! GO!!" She grunted while giving him a punch with every word

"Not gonna happen princess!!" Dean replied with a stoic face. 

"DEAN!!!" She screeched 

"listen to me!!" Dean put her down and held her from her shoulders in a rather squeezed tight. "if you fight him! He will kill you! And we will not let that happen! he already hurt sammy! I will not let him hurt you too!! I don't care how much  you can take care of yourself, I want you safe!! and sound!! Castiel got this! now let's go home!" his tone was so full of different emotions. Anger, fear, protection,Sadness but most important... sad nostalgia. 

"Cas is fighting him alone?!" She screamed as a response 

"he's got this!!" 

"Well I'm going to have his back!!" she pushed his hands off of her and ran up to the throne room. Seeing the brothers charging at each other, the sound of her opening the door distracted them.

"Kayla! get out of here!" Cas yelled 

"no!" she simply said being the stubborn and strong headed Winchester she always been. 

"Aaahh!!! the...female sam" Lucifer snarled with a smirk before he circled her. Sam and Dean reached the room "hhmm.. I can see what my brother saw...beautiful.. I think you could be a perfect vessel" and with that he dissolved into her body. 

"It depends" She snarled at him. 

"Ooohh kinky and risky! Good choice brother! Now tell me..if I say that..I would take Sams body...again, might I add, as my vessel, what would you say?" 

"I would say 'screw you sonofabitch'" she spoke Dangerously. 

"Once again.. fiesty! Love! her!" he taunted. He turned his glance off his brother and back onto Kayla. "so...if I take you... would you say 'yes' for me, for the sake of your brother?"

and with no hesitation at all, she snarled "yes I would" 

"Bunny no!" Sam yelled "don't do this!" 

"Sam! stop!! you've saved the world many of times! it's my turn!" she turned to Lucifer and glared while saying "yes!" Lucifer smirked his gnarly smirk and grin before he dissolved into her causing her to grunt in pain before while crouching down and feeling a hit of agony "NNOOO!!" they all screamed in unison.