Opinions?

Emily • Boy Mom + L&D Nurse
I am currently 22 wks pregnant with my first. I quit my job (due to it not being safe), and I began babysitting two brothers, 8 months and 2 years. They are so bad! They are always sick, there is obviously no stability at home, the little one throws tantrums if you won't walk around holding him,and the 2 yo is flat out mean and disrespectful. On top of that, the mom is beginning to ask me to watch the later than we agreed upon other things. I really need the cash right now, but I am concerned these kids are too out of control. Should I keep watching them until my leave (March 1) or should I pull the plug now? Is it really worth  it? I find myself really hating the kids, as mean as that sounds. What is your opinion?