<human>: Give me the gist of the text in a nutshell

First a little background.  We've dated for about a year and lived together for the past 3 months.  I have been cheated on before and am a little suspicious at times.  

Yesterday morning on a whim I picked up her tablet and looked at her email.  The inbox was normal but in the trash I found a number of emails between her and her ex bf.  There were no major warning flags, most of it was civil general conversation.  The problem is that she has painted this picture that her ex is a complete asshole/psycho/stalker and that she hates every fiber of his being.  So I asked her about it and she got extremely upset.  Saying that it's no big deal and she didn't bring it up because she didn't want to start a fight and that I don't trust her.  I told her that the only reason I'm upset is that she didn't tell me about it.  She grabbed her purse and walked out without saying another word.  

I admit that I do have some trust issues but am I in the wrong?
<bot>: Saw some emails between my gf and her ex who she supposedly has no contact with. I brought it up and she walked out.