My First Camel Toe Sighting

So this goes back to our first family vacation in the Tampa / St Pete area to visit our grandparents who wintered in Tampa. It would be 1968, I was born in 1956, and had two younger sisters born in 1960 and 62, so you can figure out the ages at the time.
We were at a beach in St Pete. First time in salt water and first time in white sand, and tons of cool shells. I was digging in the sand and my sisters walk up and the next youngest is standing right in front of me. The youngest one tells the other, "Connie, your crack is showing". I look up and sure enough, her little yellow bikini bottom is wedged deep into her pussy crack. I look at her face and she almost had the look like "I did this for you, do you like it?"
Now I had seen my sisters naked all the time growing up. And I was at that age where I was taking notice more about their little bodies. I started masturbating my small cock about a year earlier and it seemed like I was always horny. I would make excuses to have to go to the bathroom when they were in the tub just to see their pussies, and to let them see my young cock. Then I would go back to my bedroom and masturbate.
So back at the beach, I look down again at the little camel toe, close enough that I could have reached up and pulled her bikini out of that young crack, but she beat me to it. She reached over to her little pussy and got her fingers into her crack and pulled the bikini out. I looked up at her again and she had a big smile on her face, and then the two ran off to the water giggling. I do have the feeling this was all a set up..... but it sure was fun.