Fed up at work...

I'm stuck working doubles a couple times a week. Its not awful, but I'm exhausted afterwards and find it difficult to wake up in time the next morning. It started off as a favor once, and now its normal to schedule me like that.

But my biggest problem is the coworker I have to work with EVERY time I work a double. She's my moms friend so she knows me on a personal level. However, she spends the whole day putting me and others down. She'll make comments about my weight (even though I'm thin, 5'2 and 115 lbs) and talk about how thin she USED to be. And if I call her out on it, she doesn't see that what she's saying is hurtful. My boss and supervisor know, and they don't do anything about it.

I wish they would hire more people so it wasn't a skeleton crew and i wouldnt have to kill myself with long hours and verbal abuse. Ugghhh.