I was staying at mom's house for my 30 day leave from the military, after a few days a couple of friends of mine came by, they visited and the topic came up of going to Vegas. I said I was game, and mom had over heard and said Vegas. And my friend said yes an over nighter to Vegas. He asks if she would like to go, which was all right with me. She replied she would. So it was settled and we would go to Vegas on Friday.
Friday came and mom and I were ready to go, my friend and his girlfriend finally showed up at 7 pm, and were 8 pm before we hit the highway. My friends car was loaded down with all his camping gear in the trunk, why I don't know, we had to put our suit cases in the back seat with us, he had an old Chevy Biscayne, 2 doors. Mom and I sat in the rear with barely enough room, he said he was sorry it was crowded, and mom said it was ok.
As mom and I got into the back seat, we found it a little crowded, when we got on the freeway, I finally told mom to sit on my lap, so to relieve some of the sitting discomfort she moved onto my lap, I stretched out my legs as she sat down. She wasn't heavy only 120 lbs. and 5'4' inches tall it was ok. I had a few beers during the day so it was okay with me.
After about 30 minutes and on the highway I started to get a bulge in my pants of her moving and of the cars up and down motion when we hit a bump in the roadway. She was wearing a dress, so I took the edge of the dress and pulled it up in the back slowly, and each time a little bit more. A couple of times she did look back at me, but turned and shifted her weight around on my lap. Only to make my bulge grow a bit more, I tugged on her dress again until there was nothing between us except her panties and my pants.