You should apologize for using her spa bath without permission. From what you say she only gave you permission "to help yourself" to what is in the fridge. Her spa bath should have remained off limits. The good thing is you cleaned up though. But you need to have a talk with your friend as well if he does not take your job seriously.
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Balance is needed within the universe, can be demonstrated in most/all concepts/things. Black/White, Good/Evil, etc.
All dependent upon your own perspective in your own form of existence, so trust your own gut and live the way YOU want/need to.