I decided to tell some very close friends that we have an alternative relationship after an incident. One couple I did tell them a bit more but not *who*, because since we are so close I know I would say something just with how comfortable I am.
On the other hand L lives a bit far away so its not like I really run into the same people and we don't do any PDA if we end up in the area I live in. Hope you figure out what works for you