I have a 49 yr. old female gardner. She is a single mom of a 9 yr. I just found out she is a drug user. I don't know anything about drugs. Should I keep her working for me?

I have had her for about 2 weeks now. She can’t seem to stay focused long enough to finish one project, before she is starting another one. She comes and goes several times in the day. Apparently to take her son to baseball practice and whatever else. She has no child support, the father does not work above the table. The other day she hit me up for a $30 advance, she had no food to get through the weekend. I advanced it only because of the boy. He is a sweet, polite young man. She tried again this weekend for another advance, I told her I do not make a practice of paying in advance for anything and she needs to make up her last time so we can get even again. I am confused, because I don’t want to enable her, but then I want to make sure she can feed her son. What would you do?