I would understand why she asked me, but I would not understand how she could betray me by spying on me. I would treat it as though she heard a rumor and assumed the worst of me...
No offense but w/ cheating it not something that you can just be oh sooo who was this gift for and expect to receive the truth. I know that a situation I was in, I did ask that question first and was told a lie and I still snooped and found out that I was actually correct.