I am looking for a selfbondage stories. I dont know the title but I can remenber what it was about:

A girl inserts an vibrating egg, puts on a castity belt and wents to the basement. There she lock the door and put the kex under the door. The egg is remote controled by a timer in the kitchen. She then locks her hands to the wall with an combination lock. So she have to wait till the next morning to get free. The next day she have to wait till darkness so she could get out of the window and to the front door. In front of the door the egg begins again to vibrate. Back in the house she could unlock the belt and remove the vibrating egg with the key on the table.

Does anybody know this story?

Thanks b23