I often take walks around my local area as I live in a semi-rural part of West Yorkshire. On a lane I use regularly I don't often see many passing cars and if it's in the week, not many other people. One Tuesday afternoon I was there and heard a car approaching from behind me so I stepped in to the verge to give it space to pass me. The car slowed then stopped with the passenger window level with me and quite close. The window was down and a young guy was driving with a young woman in the passenger seat. She asked me if I knew where a particular road was and showed me it on her phone. I am familiar with the road she wanted and know it to be a popular dogging lane. The woman was wearing a very short denim skirt and a very loose strappy top. One of the straps was down her arm and I could easily see all her naked left breast and nipple. I bent and put my head in the window and pretended to look at her phone. The driver just said, do you like her tits mate? She smiled and looked me in the eyes. I managed to mumble a yes, very much! He reached across and lowered her top and there they were on full view. She was still smiling and looking at me. The driver then put his hand on her thigh and moved her skirt up and said what about her pussy? I looked down to see her naked pussy as he gave her pussy a rub. She parted her legs for him to play with her very wet pussy as I watched. She was still smiling and looking at me. You can play with her if you like said the driver as he sat back in his seat. I of course helped myself, cupping and squeezing her firm tits and tweaking her hard nipples. I stroked her wet pussy and easily slipped three fingers inside her. She had now closed her eyes and was pushing back on my fingers. The driver had his cock out and wanked as he watched me pleasure his passenger. Unfortunately we had to stop there as another walker was approaching. They thanked me and drove away leaving me to carry on my walk with a raging erection.