Did it once many years ago .At night on an interstate . Her facing me kind of leaned forward with her head over my shoulder . After all we didn't want to be unsafe and me not be able to see where I was driving . It was late and there was nobody on the road . If I remember right we pulled into an unused weigh station to finish .
When we were on any longer trips on an Interstate, my wife would usually give me head. She always wore a sundress and nothing else. She would turn sideways in the seat with her ass raised up facing her window. When she bent down to suck me, it would slide forward. Many a truck driver honked in approval of the view.