Changes – Part 1

My wife, Tammy, and I live in a western state with our daughter, Jenny. My wife has always been a horny little thing, and our sex life has been very active. We also are an outdoor oriented family and spend as much time as possible at the lake or up in the mountains during the hot summer months.

Our best friends live next door to us. Tom and his wife, Jan, have a boy and a girl. John is 18 years old and Heather is 16. All of us had all decided to rent a cabin up near the high-country for the weekend. The cabin slept all seven of us comfortably. Tom, the kids and I, had decided to make a run down to our favorite creek, for a day of swimming and cliff jumping in the cool mountain stream. Tammy and Jan found out about an arts and crafts festival that they wanted to check out. We decided that Tom, the kids and I would drive down to the stream in his Jeep and Tammy would drive our Jeep down around noon.

That’s where the plan first unraveled a bit. As we loaded Tom’s Jeep with a cooler and some bags with a change of clothes, it became apparent that there simply wasn’t room for 2 adults, two teens, and a girl. We finally decided that Jenny would have to sit on my lap for the 12-mile ride down the rough dirt road to the creek. Jenny was probably less than 90 pounds at the time, so I didn’t think it would be too uncomfortable. Jenny had always been a pretty girl and as she blossomed, I knew I was going to be fighting boys off. Having said that, I never once thought of Jenny in any sexual context. I had seen her topless or even accidentally nude a few times in the year previous, but I certainly never entertained any inappropriate thoughts about her.

Everything was fine, until a few minutes after we hit the dirt road. That is when it happened. I suddenly realized that the jostling and having the weight of Jenny on my lap was starting to make me hard. I didn’t entertain any sexual thoughts of Jenny, it was simply the motion of the Jeep and her weight on my lap. I tried to will myself back to flaccidity and when that failed, I began reciting the periodic tables. It was useless. As the jostling continued, my cock grew to full size. I still hoped that Jenny hadn’t noticed, but then I saw her turn towards me with a quizzical look. Then she very discreetly eased her right hand under her butt and it came to rest on my rock-hard cock. She gave it little squeeze and pulled it away.

I was mortified. My daughter now knew that I had a raging hard-on. I just hoped like hell that she didn’t think I was having perverted thoughts about her. Jenny settled back against me as we continued bouncing down the road. I was a little relieved that she seemed to be ignoring my problem. However, as we went further down the road, I could swear that each time we rocked over a bump that she was actually wiggling her ass. The movement was not at all helping the swelling go down. I saw another bump coming up and braced myself. As we went over it, Jenny pushed back against me then slid forward dragging her ass over my raging hard-on.

My own daughter was grinding into my hard cock on purpose! That tidbit of information did not help my situation at all. I saw that we were getting closer to the parking lot, and I was flooded with relief. Only a couple more turns down the road and we would be there. However, Jenny wasn’t letting up. She was moving her little butt back and forth over my cock enough that I was worried that Tom or his kids would notice.

Suddenly, a new more urgent issue arose. It started feeling really good as she ground back and forth on my cock. I realized that if we didn’t park soon I was going to blast a world class load of jism in my drawers and all over my innocent daughter’s little butt. You see I have what my doctor calls hyperspermia. That is the overproduction of semen. Most men ejaculate about a tablespoon of semen. I can ejaculate nearly a full cup! There was no way I could hide that and I started to panic. I thought of asking Tom to stop so I could…what…adjust my pants? Or maybe throw up? No, I just needed to last a few more yards. Now it was a race between me cumming and Tom parking. Tom pulled into a parking spot and shut off the Jeep just in time. He looked over at me smiling about to say something, but the smile turned to a frown as he said, “Damn, Jim. You Okay? You’re looking pretty red.”

No shit! I felt my juices receding and said, “Yeah I’m fine. Just a little warm in here.” Jenny turned to me giving me a knowing smile, then she hopped out of the Jeep and suddenly my shorts tented up. Whoa! What now? At least Tom had already jumped out of the car and dropped the seat back so Heather could get out. I looked back at Heather to see her eyes locked on the tent in my trunks. When she looked up at me, she had a little smirk on her face. Busted! Now I really was feeling humiliated. Heather probably thought that Jenny had given me a hard-on. Well, OK, she did, but at least the thoughts in my mind were pure as the driven snow. I grabbed a bag off the floor and positioned it strategically to cover my now waning tent pole.

We finished unloading the Jeep and we were soon all jumping off a cliff into the cool, blue water. That finally got me back to normal and soon I put the whole sordid mess out of my head.

Tom had been on the dive team in high school and college and he entertained us with one amazing dive after another. Playing in the cool mountain water and jumping off the cliffs made the hours fly by. I did catch Heather staring at me a couple of times, which made me a little uncomfortable. I’m in pretty good shape; I have to be since I’m married to a sexy Pilates instructor. Heather was good-looking kid. About 5’9” like her mother, with a nice body and C- cup boobs. She was wearing a form-fitting blue one-piece suit that really accentuated her assets. She was also the daughter of our best friends and I wasn’t too happy about this new attention she directed at me.

Around 1 P.M. I saw Tammy and Jan pull up to the parking lot in our Jeep. I marveled at the two women. Tammy is very petite, about 5’4” and 115 pounds, with flaming red hair. Her mom was from Ireland with flaming red hair and her dad was from Sicily. She has auburn hair and blue eyes, but her skin has an olive tint to it and in the summer, she always sports a beautiful tan. Tammy is a Pilates instructor and now runs her own studio, so she is in amazing shape. She has six-pack abs and great muscle tone. Her boobs are a very perky C-cups, and she has the best butt and legs I’ve ever seen on a woman. Although she’s 42 years-old, she looks better than most 20 year-olds. When she pulled off her shirt to reveal that she was wearing a small bikini top, every man in the place stopped to gawk at this beautiful creature.

Jan is much taller at 5’9” and about 155 pounds, with long blonde hair.