I put a GPS tracking device in her car....was I wrong when I was right?

Anonymous
I kinda knew something was wrong with her when she wasn't showing up when she was supposed to and other things like that so I put a GPS tracking device in her car to find out where / what she was doing. I asked her about where she was all the time. Gave her MANY chances to be straight with me and she never fessed up. It turned out I was right and she was at her ex boyfriends place more than with me just about. One night I finally flipped and we fought about where she was and everything and she just kept on lying. So against my better judgment (because it might proved useful in the future) I told her that I had a GPS in her car and knew where she was 24/7. So after that and she was caught in countless lies she was beyond p*ssed at me? Said I was violating her privacy or something like that. So the question I want to know is... was I wrong cause I sure don't think so?
Updates
+1 y
I surprised people answering this so I guess I should update. Its been about 4 months now that this all happened and the whole thing is over with. I posted this cause I was really interested in what other people thought about it. So that's about it.
I put a GPS tracking device in her car....was I wrong when I was right?
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