You noticed it before, and you always hated the smudge under your breast. You were 9 when you asked, "Daddy, why do I have a mark like this?" Showing him, his eyes would cloud over with guilt. "Is it like yours and De's and Sammy's? Does it mean anything?" This is already posted on AO3, work with the same name/title. This is a Castiel/Reader fic!

AU, Dean/Cas. Sam and Dean are the heirs to the Winchester fortune. Sam's running for Congress, and Dean is his irresponsible drunk brother, so Sam hires someone to keep him out of trouble - Castiel Smith, a man with his own hidden agenda... Ch. 33: "You'd be a good husband. You don't hog the blankets, you keep a gun under the pillow… You're gonna make someone very happy someday."

"Feel that?" Benny whispered against the shell of Sam's ear, sending a violent shiver down the man's spine. "Feel the way your heart's trying to punch its way out of your chest? That's what dying feels like. And you better get used to it." Hurt!Sam, Protective!Dean, season!8

After an unimagined change of lifestyle, Dean and his rag-tag family find themselves exploring their new mansion. It had to be too good to be true - no Winchester was ever that lucky. Dean discovers an underground lab with strange concoctions, animal testing, and, to his horror, human experiments. One of which he learns is named Castiel.