I'm into go out and wear panties and/or nylon. Or go into store with fem stuff and take pictures in changing cabin, or on beach or in parking. I like semi public places.
Cum over her panties. Or stocking, whatever you prefer.
Put it in your mouth.
Go public shopping, wearing a face mask. Keep it in your mouth, noone would know, avoid to speak
I forgot to say for a start: a buttplug would make things interesting in public. Wearing it creates a bit of panic of meeting friends. Add one to the list (maybe a small one because you will be stressed you will drop it by mistake).
Do you enjoy my ideas? I just like to think being in your place.