Why are virgos so stuck up and critical?

I'm a single parent with 3 different by 3 different men. All the fathers were deadbeats and abusive. I had my last child several weeks ago. My child's father left me for another woman is now living with her. I got evicted from our apartment Now I live with my sister (a virgo) now and I thought she was taking in myself and children out of the goodness of her heart. However, she nags me constantly. Tells me how much of loser I am. If I don't do what she asks me to do she threatens to put me and my children out. It's like she get's a thrill out of me being miserable. I'm sorry I'm not like her. I don't have an MBA from UIC. I don't own a fancy 5 bedroom house like she does in a posh neighborhood. When company comes over she doesn't even acknowledge me as her sister, but as the help. That hurts me so bad. I'm a scorp btw.