<human>: TIFU by finding some pictures I don't think I was supposed to see on my laptop.

Throwaway account here, but my Fiancee and I have been together for 3 and a half years and have the most adorable 20 month old daughter in the entire world.  To say that I love my girls more than anything would be an enormous understatement.  We've had a wonderful relationship thus far, and I have never suspected anything out of the ordinary from her.

Several days ago I had her transfer some pictures of our daughter from her Iphone to my laptop to send to some of our family members.

Earlier today, I opened up Itunes and began to see which pictures I wanted to send.  There were plenty of good ones of our daughter and of the three of us.  Hell, I thought I had hit the jackpot when I discovered some nudes and various other sexy photos that she had never sent to me.  However, I soon became suspicious when I noticed several saved snapchats of her in some sexy lingerie that she had not sent to me either.  She must have been completely unaware that she had synced her entire photo gallery.

From there things got even worse. I found some nudes of her (obviously sent to some other random dudes), and even screenshots of several of the guys responses ("I like your ass lol."  "Wish I lived close enough to meet you lol.")

I feel completely blindsided and betrayed.  I work 40+ hours a week so that she can stay home to raise our kid, and this is what I receive in return.  I have yet to confront her about what I saw, but plan on it once she gets off of work.

Can you condense the text into three sentences or less?
<bot>: Fiancee transferred pictures to my laptop from her Iphone.  Found sexy snapchat screenshots of her, and replies from guys she had sent them to.