<human>: I moved back in to my mom's house after a divorce. I've always been out on my own, but this was the best move for my financial situation. My sister on the other hand has never moved out even after having two children. Currently I am sharing a bathroom with her and her children (8f and 6m) and I don't know how to handle this situation. I've always been a clean person and like to keep my living area clean and clutter-free. Especially my bathroom because I won't feel clean if I'm showering in a dirty area. I've asked her to keep the bathroom clean and not have trash and other clutter on the counter, not to keep her bras hanging around, not to leave her reusable pads hanging around, and to not leave her dirty clothes on the floor. All things that should be commonsense right? The kids are cleaning up their messes, but she refuses. She says she doesn't give a shit about what I want. I've asked my mom to back me up and she just wants to stay out of it. She thinks we're two grown adults who should be able to handle this on our own. I agree, but I don't know what to do. I literally don't feel clean after taking a shower. Any suggestions?

Condense the text into a few key points
<bot>: adult sister refuses to keep shared bathroom clean, says she doesn't care what I want, don't know what to do?!*