You definitely need to start keeping a log of what's being said and dates and times. Also you need to report this to your boss and inform them that you don't feel comfortable at work with him there because of the things that are being said to you. You feel like this is becoming a bit of a hostile work environment more on the sexual(sp?) harassment type way, and you really feel like you need to have a lock installed on your door to feel more comfortable, since you found him outside of your door, when no one else was home. Also, you would feel more comfortable if while you were in the home, if they would limit his entry to the home to when the family was there, and not when you were there alone.