Dear C,
If you dare try to talk to S and try to mess up my friendship with her I will not hesitate to torture you in the most brutal way possible, and trust me, you do not want that. Threaten me all you want, I will not allow you to talk to her, I will not let you be around her. She does not need you, especially after what you did to her. Do not think after the incident you can come back like nothing happened and expect to be friends with her again, because let me tell you, friendship does not work like that. Friendship is something you have to appreciate and be grateful for. Friendship is to not be taken for granted. I will keep her away from you no matter what, even if I die I will not allow you to be around her, you will just hurt you more. So either stay away from her and back off right now or I will have to make you.