Mik was going back to university, and he had a lot of stuff to take. It was just over an hour’s drive, and we reckoned we had two carloads of his stuff that he would need. We had managed to get Mik a room in a shared house. The room was his own; they shared kitchen, bathroom and living room. Paul, my husband, and I spent a good hour trying to cram as much in as we could. The plan was to get up there, drop Mik and his stuff off, and then come back home for a second load, and then basically leave him to it.

We tried getting the stuff into the car, but we really didn’t have a big car, and it was looking as if it would be three journeys, and possibly four, and Mik didn’t have a car at all. Luckily the uni was near his shared house.

“Look,” Paul said, “if we use the front seat and fold the back seat down, then we can get a lot more in, but that only leaves room for one passenger.”

“That means a lot more time spent on loading at the other end, Paul,” I said. “Why don’t we do that? But I sit on Mik’s lap; it is only an hour, and then there are three of us to do the unloading; it will be much quicker.”

“I think I can cope for an hour with Mum on my lap,” Mik said.

“Okay, let’s try it,” Paul said.

Mik sat on the single seat in the back, and I eased myself onto his lap. It seemed okay to me.

“I think that will be okay, Dad,” Mik said. “It’s only an hour.”

I got off Mik, and then out of the car, Mik followed, and we finished cramming as much stuff as we could into the car. Paul stopped at the petrol station as we left, and as he topped up the petrol, I went in and bought some sandwiches, drinks and crisps; we would need fuel ourselves after we had finished unpacking at the other end.

As the journey progressed, I became more and more uncomfortable sitting on Mik’s legs and started wriggling to make myself comfortable. This had an unfortunate effect on Mik as he gained an erection which was painfully protruding up between my cheeks. I tried to ignore it, but not only was it a little painful, but it was pulsing, and that had an unfortunate effect on me and my own state of arousal.

This was ridiculous; as much as I knew that Mik couldn’t really help it, he was twenty years old, and someone wiggling in his lap was frankly going to cause a state of arousal. I knew that. But I was nearly fifty, and I should not get aroused by my son – absolutely not, but frankly I should be able to control myself more.

I found myself holding my breath, breathing in but not out. I gasped a couple of times; trying to stifle them was difficult.

“All alright in the back? Paul asked from the front.

“It isn’t the most comfortable, to be honest, but I will survive; just try and avoid the potholes.” I replied.

“All okay for me, Dad,” Mik added.

The next bit of road was in need of repair, and I found myself bouncing around on Mik’s lap. I tried to manage it by bracing with my arms, but I was only able to get a steady grip on the door; my other hand had only all of Mik’s gubbins to hang on to. I swear that if I had been wearing less, then the situation would have been very different.

One big pothole and Mik jolted up, almost going where he really shouldn’t, my body reacting the way I didn’t want, my gasp was much louder, and I was desperately trying to control matters. I couldn’t. My pressures were building, my electrics were charging, and oh my God, this was ridiculous.

“Sorry, baby,” I said to Paul, “all this jiggling, I really could do with the loo.”

“Okay, sweetie, there is one in just a mile; I’ll pull in.”

I was trying to lift myself off Mik’s lap as much as I could. That seemed to stop matters getting worse, but it didn’t ease them. I was holding on – just.

Paul pulled in and parked; I got out of the car and hurried to the ladies. I grabbed a cubicle at the end and almost wrenched my knickers off; they were soaking. My hand dived down, and I slid my finger along my crease and then inside and wiggled. My other hand was busy too, a finger also in my crease but going upwards, and as I touched my nubbin, my body just exploded, an orgasm erupting, sending pleasures throughout my body, my toes tingling along with my ears, and my fanny clamping hard on my finger.

Eventually my body relaxed, I slipped my finger out of my fanny and wiped myself with toilet tissue. I took some tissue and folded it into a pad, and as I pulled my wet knickers back up, I placed the pad in the gusset. Hopefully that would dry my knickers and insulate me a little from the arousing effect of a hard dick in my crotch.

I washed and dried my hands and then went back out to the car.

“All okay, sweetie?” Paul asked, “Crumbs, you are a bit red in the face.”