Grell's Little Sister (Sebastian X Reader)

{Writes block - I will try to update when I can}

~The secret of Grell's past come's out and so does Sebastian's true feelings.

But how will Ciel take this and how will Grell. How will you, as Grell's Sister, fall for Sebastian when you don't know what he really is?

(And there will be a lemon... I've told you.. So don't yell at me if you read it)