Well, an odd thing happened this year- I saw this ex-gf at a cafe and she came over to chat. She's a medical professional, and I ended up going to her office for a number of treatments- all legit- which gave us a chance to talk and catch up. One thing led to another and we had the chance to relive some of our earlier adventures.
I'd put some risque pics on my phone to show her; ones that reminded me of her, or something we'd done. And one was a photo much like this one- a young woman sleeping, in the "frog" position, legs spread side, her feet together and her naked pussy clearly on display. When I showed it to her she smiled, and said, "That's how I sleep almost every night!" It was then she told me for the first time that all those years ago, when she'd been teasing her kid brother, that he had seen her in that exact position- and OFTEN!!!
When her grandparents visited from out of state they got her room, and she had to sleep in her brother's room, in a bunk bed. That's when she first let him see her "sleeping" in this position, and it got to be an every night thing while they were forced to share a room. And after, every now and then when she was feeling especially horny, or daring, she'd manage to get "caught" sleeping with her covers pushed down and pussy completely exposed. I think it went on until she moved out and got married- I could never get her to say just when it stopped. She probably just doesn't remember, but my wish is that she never really DID stop- and has done it since their youth, even when they were both married....