Here is my two cents. The cop was wrong to tell his father but I am not surprised and his father was wrong to bring it up. But that is water under the bridge now. But with that being said if he wants see you dressed and go to lunch that might be fun just spell it out to him when it happens. That this is your thing and you enjoy it and have friends that you see that also enjoy and there is nothing sexual in it.
I have been stopped while dressed and got a ticket. I immediately told the cop while I pulled out my license that I was crossdressed and was just visiting friends, more than he needed to know. I had not been drinking. He was very professional and said nothing about me being dressed. I was stopped in the gay neighborhood in SAn Diego and had to go to traffic school. My crime was that I went straight in a left hand turn lane. AT traffic school everyone got a laugh out of that considering the area of town.