I'm rifling through the books on the bookshelf when Sam comes in. "Looking for something?" He makes a joke. I turn my head and give him an annoyed look. He gives a sign of apology by gesturing his hands up and I snort in return.

"Ughhhh. Where is it!" I bang my hands against a shelf in frustration.

"What are you looking for?" Sam asks walking over to where I'm standing.

"This book me and Castiel were reading. It's old, small, blue." I try to describe it.

"Does it have a name?" He asks looking at titles. I glare at him "right. Okay, small and blue." He starts to look with me. Another 30 minutes pass and we still can't find the book. I sit down in a chair defeated and Sam sits across from me "Maybe Cas has it?" He looks through his hair at me.

"Damn, you're probably right" I swipe my hair out of my face. "I need to finish reading it."

"What's so important about this book?" He asks me.

I sigh "it's got information about old markings, the Mark of Cain is in it.. Didn't really get to read much after what happened." I tell him openly.

"What happened?" He looks at me inquisitively. I tell him the same story I told Dean the night before about Hannah. "Wait, wait, wait. You used the blade?" He interrupts me. I nod my head. "And it killed Hannah?" He asks another question. I nod my head again raising my eyebrows. He pushes out of his chair and calls for Dean.

Dean comes walking in a few moments later "what?" He looks at us chewing his food with his mouth open.

"She used the blade to kill Hannah" Sam tells him.

"Dude, where have you been. I know this already" he bites into his food.

"Don't you remember that only someone with the mark can use the blade to kill a demon. Probably the same with an angel."

"It's a pretty sharp knife Sam, pretty sure it'd kill her either way." I speak up.

"Shit, he's right" Dean walks over to us throwing his food down on the table.

"I'm confused" I give in not following.

"She's an angel, you can't kill angels with anything other than an angel blade. Sam starts to say to me.

"But I did." I say flatly still not following.

"So then you must have the mark." Sam adds. Dean rushes over to me and I lift up my arms for him to see, already knowing that's what he wants. We both look at them but nothing is there. We look at each other with confused looks.

Dean breaks the silence "the baby" he whispers out. We look down together at my stomach and we are all silent.

"So if I stabbed her with the blade, and if I didn't have the mark she would still be alive?" I finally am able to form a question.

"Right. She'd just heal from the wound." Sam answers "Dean.." He tries to get his brothers attention.

"Dean!" I say louder when he doesn't answer.

"What?" He snaps back to me. I move a step back startled at his anger. "Sorry, it's just. What if it's fading because the baby is growing." He thinks out loud to us.

"Fading?" Sam speaks up again.

"Yea man, the uhh, the mark is fading." He rolls his sleeve up to show his brother.

"Why am I just hearing about this Dean?" Sam yells at his brother

"There's kind of a lot going on Sam!" Dean defends himself.

"I've been researching months about the mark and you're just telling me now it's fading away! Could've been important to know before!" He fights him.

"Not like it changes a damn thing anyway, we still don't know anything about it." He rolls his sleeve back down.

"The book" I speak loudly to interrupt them.

They both look at me "what?" They ask in unison.

"The blue book I was looking for. It said something about the mark of Cain, remember?" I look to Sam. He nods his head "there might be more about it in the book!" I finish telling them.

"Well, where is this book?" Dean asks.

I open my eyes wide "Castiel has it."

He sighs "damn."

"It's fine, it's fine, Sam and I will go and get it from him. I'm sure he'll give it to us." I look at Sam who nods agreeing with me.

Dean rejects my idea "the hell you will, you're not going anywhere near him while he's an angel. I'll go with Sam" he suggests instead.

"I don't think that's a good idea either." Sam explains "you're pretty pissed off at him right now Dean, you shouldn't be around him."

"I'll be fine!" Dean stammers back.

"Just stay here with Hayden, please Dean. Let me do this." Sam sighs out, tired of fighting his brother.

Dean looks to me and I nod slightly. He sighs in agreement "fine."

"I'll head out and look for Cas. I'll be back with the book." Sam says walking out of the room.

Dean turns to me "so what did this book say?"

"I only read the part about life being the way to remove the mark. Castiel was reading it and I was going to read it after." I explain.

"We need that book" he murmurs under his breath.

"Why does Castiel think the grace from our baby is his?" I ask him the question that's been on my mind.

"Well he pulled me from hell. I have his mark on me too." He pats his arm. "It wasn't easy getting me out of there, he could've left some of his grace in me. Which in return is now part of our baby." He tries to answer my question and it seems his own.

"What about our little girl? Do you think she had grace too? Do you think it could have something to do with why we lost her?" I whisper out in sadness. I don't want to make Dean sad, but I want to know why.

"Could be. There's really no telling." He responds looking into my eyes. I take a deep breath and as I exhale tears begin to fall from my eyes. Dean swoops in and embraces me tightly. "Hey. It's okay H. It's okay." He rubs his hand up and down my back

"Why is this happening?" I ask into his chest. Only Dean doesn't answer me, he just keeps on holding me.