Oh, it is easy to just not answer a personal question. Change the topic:
"How was the girl's night out?"
"My aunt Agatha came over to bake dinner last night."
"I was asking about the night out on the town?"
"My aunt does drive a Town Car."
Or you can be like me, tell him last night you went to Tae Kwon Do or Karate class. You really are into the groove, and feel safe on any street at anytime, no cause to worrry about where I go at night.
This honestly has worked quite well for me, from all the older men who know my husband is an invalid, I lead a dull life. (no catcalls from the audience) But they try once or twice a year to ask me out, like tacky, tacky. They know better now-I sling the broken boards on my desk each Monday morning, lately a big old brick too. It was there all summer long, hidden by the paper we put up on shelves. One guy still didn't believe, had the incoming 6th graders go and peek. Ha! They finked him out, I went and checked in my room while he was there, asked him if my little old brick was in fine shape. He just lamely smiled, and said everything was all right.