I need to vent am i Wrong for being mad!!

Natayahia • Im a married lesbian woman who TTC #4. I have three daughters already..
So I starting cleaning and seen a old bag of stuff and decide to go thru it being that me and my wife just moved. As I'm going thru the stuff and my wife son (from another woman) picture fell out as I go to fix it I noticed that it's fold up nd deep inside the picture frame is four pictures of my wife and her ex kissed up and on the beach. I know its old so that is not why I'm mad Im mad that I told her two years ago to remove them from our house. Why would she hide them. What's her reason for keeping them? We have been together over 5 years now I'm confused and pissed!! Should I be mad?