I would just like to make the fleeting observation here that the opening comment in Ruby's post 'as your slave she is your property' made me think: Huh?

Then I looked a the threads...
Submissive vs. slave
http://www.bdsmlibrary.com/forums/showthread.php?t=1643
and
a question for the submissives/slaves
http://www.bdsmlibrary.com/forums/showthread.php?t=467

Different D/s practicioners have different definitions of 'slavery'. But I must admit that although I see that some people are willing to take this huge burden of responsibility and micromanagement upon them, and agree to accept someone as their 'slave', I still find myself unable to grasp the concept of 'property' in a context where slavery is not legally binding. But nevermind nevermind nevermind, that's hairsplitting. A problem of 'same term for different concepts'. Back to the problem at hand.

Perhaps since you, NiceMaster, mention 'Note that I want "her" to have a feeling for her safety' she is, by her actions, demanding more than you bargained for? You only have the responsibility you agreed to take. Did you actually, specifically, agree to become responsible for her not harming herself? And is this not demanding a bit much? Sure, you can use rules and punishments and methods of control, and do your best to convey a sense of value and make her feel cherished in your life. You can, as Ruby says, make it clear that 'this type of behavior cannot continue'. But if she did it again, would it be your fault? I don't think so. You are only human.

If she actually staged this specifically to be found and rescued by you, it seems rather unfair, perhaps even a bit manipulative. But if you deal with the problem, like Ruby I believe you can forgive and move on.

You probably need to find out which factors constituted the reasons for this incident: Something directed towards you? Something directed towards herself? And skill: how 'good with self-bondage' is she really?

Please note that I have never faced such a problem, so my comments are pure conjecture. Best wishes to both of you.