ANSWER:

Your mother is sinful for letting her work like this and you must avoid looking at her or being with her. 

Her movement must be restricted to the area you and your brother are not in and when you leave the house, she can clean the rest of it.

QUESTION: My mother has a female maid who walks around without Niqab or Hijab nor Abaya, just in her regular clothes. I told mom She said: “Yeah, but what do I do now? I cant just fire her (maid) or make her (maid) work with Niqab on. You guys (my brother and I) can’t be on your owns closed all day as she (maid) has to eventually come to clean. InshaAllah Allah will understand.”

Character and Morals, Halal/Haram Matters |