And He Holds Me So Tight (слэш)

Dark!Blaine kidnaps Kurt and keeps him as a sex slave/pet. This is extremely dark, proceed with caution. From this GKM prompt:
Kurt's boyfriend keeps him locked up in their house at all times. He's not allowed to leave without supervision, he can't wear clothing, sleeps on the end of the bed and is fed from a bowl on the floor. Basically, Kurt's boyfriend has made Kurt their pet.
Strict non-con, please. Kurt doesn't want any of this and he's desperate to get out, but he's trapped.
The only time Kurt is ever allowed to sleep in his bed is after sex, because his boyfriend likes to cuddle.