I'm Tired of Being the Only One Who Cleans Up After My Sibling

I know this probably sounds small next to what other people are going through. But living with someone who refuses to clean up after themselves does something quiet to you. It wears you down in a way that's hard to explain to anyone who hasn't lived it. We recently moved into a bigger house, and because of the layout, my sister and I share a level — kitchen, bathroom, the whole thing. At first I was actually excited. Our own space, a bit more independence. It sounded like a good thing. Now I dread it, because somewhere along the way I quietly became the default cleaner for both of us. She eats in her room and leaves the bowls, plates, and cups there until half the kitchen has just… disappeared. I'll open a cabinet and everything's gone. Then the moment my mom says something, out comes this mountain of dirty dishes like it's the most normal thing in the world. Some of the pans have been sitting in the sink for weeks. There was dairy dip left out so long the smell hit me every time I went to wash my own plate. The bathroom's the same. I'm the one cleaning the toilet, taking out the trash, asking — again — for the bare minimum. And every time I bring it up, she acts like she cleaned once, so somehow she's exempt forever. The part that actually gets to me isn't even the mess. It's that I've told my mom so many times, and nothing changes. She tells my sister, my sister does the bare minimum, and a few days later it's disgusting again. And I'm left with the same two options: live in it, or clean it up myself. I'm not her parent. I'm not her maid. I shouldn't have to beg another grown adult not to leave rotting food in a space we both share. But more than the dishes, I think I'm just tired of being the only one who seems to care. The only one who notices. The only one it all quietly lands on. Maybe this is just a rant. But if you've ever lived with someone who made a shared space unbearable — and felt weirdly alone in it even with people right there — please tell me I'm not the only one.