She works for an apt./new construction cleaning service. The man who owns the company makes it a point to 'drop by' where she is working alone and rubs her back and has even tried to kiss her. There is no one above him she can report him to since he owns the company. She is a single mother and needs her job.

Has she tried to tell him that she is not interested in his advances?

First she has to say NO, and be clear that his advances are not wanted.

If he continues she can sue him for harassment.

So does she need the job "that bad"