Once again we have driven up from friends at the other end of the country and once again there has been an unspoken agreement that we should come off on the journey. As we drove along I started to stroke my wife on the outside of her slacks she sitting with her legs open to allow me free access. About half way up the country we stopped at a services and she took the opportunity to remove her panties so that there was only one layer of material between my fingers and her clit.
After a while she became so excited that she pulled down the zip on her slacks and pushed her own hand in and started to rub her clit. After several miles of travelling we decided to pull into a service area and there we sat and wanked ourselves off. I came first shooting off as she watched and then I sat back as she spent several minutes fingering her clit and then coming to a screaming orgasm, her hoping that the man watching the security cameras had seen her explode. This is one of her favorite fantasies.