My sister is a happily married mother of three and works as a manicurist. One of her female clients goes in once a week for full mani and pedi and without fail tries to get my sister to go out with her on a date. Like courting her. My sister asked me how to counter her. My sister is a very sweet gal. I told her to spend as much time as she can talking about how wonderful her husband is and how happy she is to be a mom. I told her to get a large family portrait and set it up facing her lesbian client.
Worked like a charm. The lesbo quit hitting on my sister and found someone else to harass.
Sort of a temptation game. If it’s a private business where the proprietor understood, laying the gospel on the tempter would be a good idea. Otherwise what you suggested was a pretty good hint.