Dog rant

I know my dog doesn't understand things like humans do but he knows he's not allowed in my room. Well, tonight my mom went in my room and forgot to shut the door. It started to thunderstorm a little later and we were in the living room, when my mom walked past my room and said that my dog was in there. He got on my bed and THEN HE FUCKING PEED ALL OVER IT. NOT JUST ON THE BLANKET, NOOO HE PEED THROUGH THE SHEETS. I'm so livid right now I can't even look at my dog. I know he was scared and all, but he's 10 years old and he knows the rules by now. 😡😡😡😡