immature mother

My mother is honestly on of the most immature women I have ever met. I'm living with her until my husband gets back from training (army). She is constantly telling me how broke she is and asking if I can pay for this and that because she has no money. But at the same time she goes out with her friends for drinks and dinner, buys brand new outfits, gets her hair and nails done. But is "struggling to pay her bills". It's annoying to come home to find new shoes laying around and clothes in the laundry but yet I'm 36 weeks pregnant, I have a waitressing job, and paying my own bills ON TOP of trying my best to help her pay for whatever she needs. I'm annoyed and wanting so bad to just move out. I can't handle her for much longer. She's rude and has an attitude about everything. Any advice lately?