I think underneath it all she was just angry she got caught!
I think you pegged it here. My H was very upset about his privacy being invaded as well, and at first it worried me (that he was mad at me). Then I realized "Tough!". Once I knew about the A and H confessed, I stopped the major snooping altogether. It took him awhile to believe I stopped. Keep your promise and don't snoop, that way you can look her in the eyes and tell her you kept your word.
I think you did well here. Kept it calm, stated your case and respected her. I believe her moods will go up and down this week. Your turn to stay level, polite, and talk with her when your time limit is up.
