I hate when people move stuff without asking or telling. I had a envelope and the lease on the table…

I hate when people move stuff without asking or telling. I had a envelope and the lease on the table and now it's gone. And that envelope had my sons health records birth certificate and ssc along with mine and my BF. And I know it was his mother. Like don't move shit that isn't yours. And I know it's in her room because she feels like she needs to hold onto every thing. Mail that is addressed to my BF and important papers. And she's not home. So I have to wait for my BF to get home to look in her room cause I'm respectful enough not to go through her stuff. Idk why but I'm just pissed now.