This is when Jack being born killed all those people including Castiel, Crowley, and thought to be Mary. Sorry I am going back in time a little bit. This is when Sam and Dean told her about the death's of her friends and brother.

Umm Kate we need to talk, Sam's voice was sympathetic.

Yeah, Dean seemed very sad.

What is it? Kate knew something was wrong when the usually strong boys had red eyes and looked defeated.

You know Jack, your mate? Sam asked with a shake in his voice.

Yes he is funny! Kate giggled.

Well that little bit-, Sam cut Dean off.

Well when he was born some sacrifices had to be made. Sam's eyes were swimming.

What kind of sacrifices? Kate seemed to understand something bad happened.

Well Cas and Crowley died, Sam told her, And Lucifer and our Mum had went to another world.

Oh, Kate looked at Dean.

Lucifer ripped her heart out already you know that Sam! Dean told Sam still looking at Kate's reaction.

Kate as suspected started to cry.

Dean I am sorry I am trying to be strong for you! Kate remembered what he said so long ago.

It's okay Kate, Dean told her.

Kate ran into Sam's legs and gripped so tight he couldn't move. He crouched down and hugged her.

You know it's not Jack's fault right Kate? Sam looked at Dean talking to him too.

Yes it is! Kate yelled at Sam.

Jack walked in hearing the chaos. Everyone looked at him and Kate stuck her tongue out at him.

Did I do something wrong Sam? Jack asked wondering why everyone seemed so sad.

No Jack, Sam still wanted him to feel welcome.

Kate squirmed out of Sam's arms and fell what seemed like a long time. Sam was so tall that she looked back up at him from the ground and he seemed 10 feet tall.

It's all your fault Jack! Kate yelled running to her room.

What is my fault? Jack cocked his head at Sam.

Nothing Jack, Sam sighed.

Jack walked to Kate's room to figure out why she ran from him. They were pretty good mates and he always made her laugh at his confusion about the world.

Hey Kate what's wrong? Jack came up to her crying in the corner of the room.

You killed them! Kate hated him for killing her brother and trapping her other brother in a different world also for killing Mary and Crowley.

Who did I kill? Jack looked at Kate with utter confusion.

Kate smashed a flower vase Cas bought for her when she asked what a flower was. With the noise both boys ran to the door frame to see Kate get up and look at Jack.

You stupid bitch! Kate's eyes turned angel blue and her wings popped out.

Jacks eyes turned his yellowish brown colour and he then controlled himself and looked at Kate with his normal excited tone.

I am sorry Kate! Jack was mad at himself for killing al those people also.

It's all your fault! Kate threw him across the room.

Sam and Dean ran to Kate seeing her anger and grabbed her tight. She squirmed and screamed trying to get lose from their touch. Jack got up and looked at Kate squirming and the brothers trying to get her to calm down. Eventually she did and they let her go.

I am still pissed at Jack though! Kate yelled at the brothers looking at Jack with a angry look.

I know you lost many people Kate, but you don't have the right to start swearing again! Sam scolded.

Sorry Sammy! Kate turned to Sam ashamed.

She of course loved Sam, Dean, and Jack but she couldn't imagine Cas being gone forever! At this thought her eyes teared up and she pushed the tears down when she saw Dean look at her. Jack then left the room and went to his own room.

Sammy will they ever come back like you guys do? Kate asked hopefully.

Sam didn't know what to say should he crush her or give her some hope? Dean decided for him.

Yeah, Cas is coming back, Dean looked at Sam and back at Kate.

Really! When? Kate asked excited.

He will only come back if you're good! And he will come back very soon if you're extra good! Dean knew Sam was having a hard time and he didn't want Kate to make it any harder.

Is that true Sammy? Kate looked at Sam with a glow in her eyes.

Uh, yeah Kate he will! Sam was on board knowing she would try to be good at least.

You're lying! Kate yelled she felt the energy coming from them.

No they aren't, Jack walked up to Kate and grabbed her hand.

Really Jack? Kate accepted the hand.

Yes he told me, Jack looked at Sam and Dean.

I'll go draw him a picture! Kate ran to grab the supplies and started to draw in the kitchen.

Don't you think lying is wrong Jack? Sam asked.

I know but, I love her and want her to be happy! Jack smiles going to help Kate draw pictures for Cas.