The Girlfriend and I have been together for 6 years now, and for years every time we go on a long trip she will get horny (we fuck 3 times everyday, it is crazy but we love to fuck each other) and pull out one of her many toys usually a clit bullet put it on her clit, and start to masturbate beside me while I drive.
After some time when the vehicle starts to really smell like her wet dripping pussy I will find a place to pull over. Depending on the weather or how off the road we can get will determine how we fuck. But the result is always the same, a deep cream pie inside of her warm pussy. I love it even after all these years, and the untold loads I have shot into her, each one always feels amazing. Feeling her pussy react to the warm cum shooting inside of her. She almost always cums right from that. If not she will work my cock till she gets herself off using her toy and my cock to pleasure her.