Not really her first ever or even a first with me there, but one that sticks out in my mind. We had been married for a few years, she was 22 0r 23, and she had started to sew her own outfits as there were none sexy enough for us. She had done a a fairly conservative short sleeved top and, the reason for the effort, a skirt that she could not sit down (maybe 12" waist to hem, so not super short, those were frequent projects later) without giving a bit of a flash, all in a kind of plain grey plush material.
We were drinking happy hour midweek in the lounge of a fancy Hilton hotel, us and a few business guys on expense accounts I'd guess, all suits but ties at least loosened, no other gals there.
I went up to the bar for another couple of drinks, and when I came back Connie's face was almost purple from excitement. A guy she guessed to be 60 had been giving her the eye, and she slowly gave him a spread upskirt. at the time shaved was seen as real kink, and she was self waxed hairless. She was wearing no panties, just a "look at my c*nt, old man" show, gave it to him not just a glance but an obvious several second look. She said she thought he was going to have a heart attack on the spot.
Always proud of her