What is the best general approach when you are confronted in public with your plate/fwb/ltr is with you? I was with my ltr today in front of an apartment entrance with stairs, making out. Some 40 yo feminist comes and asks us sternly to go away. Now since she was annoying I didnt and we stayed there. A few moments later she shows up again this time asking more nicely with a more kind tone. I then told my ltr to get up and we left, while we were leaving I told the 40s lady "Only because she was nice about it." Now deep inside I dont care about this shit, I wouldnt even insisted to stay if I was alone. But since my ltr was with me I was afraid to look weak if I just stood up and left so we stayed. But after getting up the second time, my ltr was whining about her being a bitch etc. I had to hold her by the neck and make her a little lecture about why we left: because she was softened. After that my ltr didnt talk much about it and the rest of the day was nice. But here's the thing: my instincts are now telling me that getting up was wrong and that I should've stayed there and told the 40s lady to piss off or smtg, to be more rebellious in short. (Not because I wanted to sit at the stairs but as a power move you see)

Now my question is this: How could I have handled this shit better? What general path to follow when against confrontations in general with a girl with you?

ps. im 20, ltr is 18