This happened this summer in the area of Bald Creek Falls, in East Tennessee. Jeannie and I decided to drive to see a beautiful waterfall about an hour from our home.
Enroute, Jeannie (J) was feeling kind of horny and lowered her top and exposed her big, beautiful, tits. This got me horny as she played with them and rubbed her nipples.
I was driving on the Interstate in the right lane, the "slow" lane. I came up behind a truck doing under the speed limit, and asked J if she wanted a stranger to see those tits. She said sure. I got a lane over and slowly passed the truck and I slowed to match his speed as we reached the cab.
J's tits were fully exposed, and she started twisting the nipples as she was turned on by the anticipation of a random guy seeing her tits. We got even with the cab, and I stayed right beside him. J said he's not looking. Then she said, OMG, he's looking.
He was a 50ish man, and she said looked rugged and handsome. She said he smiled at her, and she waved. She let him see her rubbing her nipples and she thought he was jerking off. As we came to our exit, I slowed and got behind him and exited. J said they waved at each other as the view declined.
Eventually we reached the falls and since it was a weekday, no one was around. We parked on the side of the road as there was no parking lot. The falls were beautiful and hefty, as we have had a lot of rain recently.
Since no one was around, J lowered her top as I took some pictures with the falls in the background. We heard some cars coming so she pulled her top up and we saw a couple of cars stop and the people looked at the falls in awe.
We got back in the car as we waited for the cars to leave. When we sat in the car, J said, I'm so fucking horny, I need to cum. I asked if she wanted to find a secluded spot and she said no, when these people leave, I'll use my toy.
After several minutes, the people loaded up and moved on. Seeing the coast was clear, J pulled her loose pants down, with no undies, and got her toy out. She immediately put it on her clit and pulled her top down to rub her tits. I took some pictures as she started moaning loudly and talking dirty. She said things like, I'd love that trucker to suck my tits and jerk his cock.
Apparently, her exposing herself was a big turn on. I noticed a pickup truck stop behind us and a single male got out to see the falls. J didn't know he was there. He was in his early 40's and walked beside her window to get to the center of the falls.