Sebastian rapes Kurt, keeps him quiet by threatening Kurt's family and Blaine
I am looking for a completed fic where Sebastian rapes Kurt repeatedly. He shows Kurt a gun and a detonating device for a bomb and says he will use them to hurt Kurt and those he loves if he tells anyone. Sebastian also rapes Kurt with the gun. Kurt isn't a virgin, he and Blaine have had sex before. But once Sebastian starts raping Kurt over a period of time he and Blaine are no longer intimate. Blaine finds out one day when he and Kurt are hanging out and he notices Kurt is uncomfortable. Sebastian had been over earlier and is making Kurt wear a anal plug until Blaine leaves and Sebastian plans to come back. Blaine gets Kurt to confess and removes the plug for Kurt. Blaine goes to the warblers and it comes to light that Sebastian wasn't using a real gun or detonator, they were props from an old Dalton play. Sebastian gets charged and sent to jail. The story ends with Sebastian on his first night in jail being raped by an inmate and being called "twitch."