Another clue would be the hours she comes and goes on her work days. Massage shops in general are 10am-8pm, so if she is coming home and leaving outside of those hours you might be onto something. I am always looking at girls that are carrying those bags etc that get off the train at my local around about 9-10pm and thinking to myself..."where have you been working" and also for the WL's 10pm is roughly the closing time, so if someone is getting off the train at 11-12...similar thoughts.