Look at that pathetic cock of yours. It is worthless and yet you can't keep your hands off it. Every time I lock you into chastity I know I can't trust you to keep your chastity device locked - your desperate desire to jerk your cock always overcomes your desire to obey your Mistress. Well today I am going to be changing that. See this little padlock? Little, but strong. I am sick of your disobedience and I am sick of you thinking I care about your sad little cock. I am locking you into chastity and hiding the key in my cleavage. If you ever want to cum again you better fix your behaviour and fast. After all, it wouldd be terrible if something happened to the keys before I can let you out...