This happened to me once. I'm sure I told this story before but it bears repeating.

It was in the mid-1980s and I worked in Manhattan on the West Side around West 18th or 19th Streets off of Sixth or Seventh Avenue. I saw this very attractive, gorgeous (and busty) woman in her early 40s or so walking towards me during lunch hour on a sunny warm day in the fall. Knee high black leather boots, matching slacks, jacket and sunglasses. My first look was "Wow!" The second was that it was probably the Mistress I had two or three sessions with in the past year, but I wasn't sure. She was based in the Village. After work I called her to ask if she was in the area.

It was. This was her advice - command. "If you ever see me in the street again, do not say hello and never acknowledge my presence. If you do I will NEVER see you again." She added that, while she didn't recognize me, she never says hello to subs she saw in the street. I think that is pretty damned good advice.