This type of situation has not really occured to me but here is what I can come up with.

When useing rope to bind her hands, if it is possible, keep a blade of some kind, within her reach. Though make sure that she is in no danger with it being there, that way if something dose happen to you she is able to cut herself free. (Though instructions that she is not to touch the knife unless something happens to you should be warrented.)

If useing things with locks and chains do the same thing but with the key to the locks.