WHY!!!

I'm so mad right now. My SO threw the cover I use away. Like why! He knew I used to sleep with. He sleeps in the bed room I sleep in the front room with my 5 week old son on the floor. I have other covers I use as extra padding but my son leaked through last night and they need to be washed. He took it upon himself today while I was gone to pitch it. I'm just so mad right now. I just don't understand why. Like dang