Julian woke up with a start. His penis was erect again and he had to relieve himself in the middle of the night, even though he had ejaculated just a few hours previously. His nights of late had been full of erotic dreams, of snapshots of his mother's naked vulva and breasts, his masturbation fantasies filled with thoughts of one day penetrating his mother's vagina - making up all kinds of stories in his mind about rash and lurid things she would ask him to do - all of which he knew, somewhere in the back of his mind, were out of the question. As usual, despite three intense physical and visual encounters with Jessica, it was if they never happened. There was no follow up, no "come to Jesus" talks about what had happened - just the usual day to day life of an eighteen year-old prepping for college.
In Jessica's mind the matter was over. She was not going to encourage such behavior from her own son. She hoped that he would meet a girl when he went to college and she'd ah, "fill in the gaps." And that Julian would keep their secrets.
Speaking of college, mother and son had a trip scheduled to visit a college a few hours drive away for a tour. So they packed their respective bags and headed out on a road trip. They had booked a Holiday Inn with two queen beds close to the college, and indeed when they checked in there were plenty of students and parents milling around in the lobby preparing for the tour the next day. They were both tired as they selected their respective beds, showered and fell asleep. Jessica was wearing a tee shirt and panties, Julian his boxers. No tension between them, just sleep.
The next day they ran around the campus, visiting the various buildings and meeting with faculty. After the tour, they went out for dinner at a local restaurant. Then on the way back to the car in the dark, Jessica stepped off the sidewalk awkwardly in her high heels and she felt a muscle in her lower back tweak. She winced as she rubbed her side.
"Are you alright Mummy?" said Julian with genuine concern as he saw her hold her side.
"Yes I'm fine" she said - though it was evident not all was well. "Lets just go to the hotel and I'm sure a hot shower will loosen my back up" she said.
"Sure" said Julian. They drove back to the hotel.
They entered the room and Jessica went to the bathroom, carrying fresh panties and a tee shirt. Julian just disrobed to his boxer shorts and slipped into bed. He heard his mother in the shower. He thought about her naked body under the water...his penis rose to meet these thoughts, he fondled it but let it be, as he heard his mother open the bathroom door. She climbed into her bed but Julian could tell she was still in pain.
"Mummy, how's the back?" Julian inquired.
"Not so great Julian, my lower back is killing me. In fact I have a favor to ask you Julian, if you wouldn't mind."
Julian's ears perked up. "What Mummy?"
"Just come over here and push your elbow into my lower back will you? See if you can free up this knot."
Julian was out of his bed in an instant. Jessica laid on her stomach, and he kneeled next to his mother and awkwardly dug his elbow into her lower back, over her tee shirt.
"Ouch" she said, "no no that's not it, let me grab some oil." She got up and dug out some oil from her toiletry bag. She came back to the bed and, turning around so Julian could not see her breasts, lifted off her tee shirt and laid down on the bed. Julian's eyes widened at this. His cock responded, growing rapidly in his boxers as he eyed the side of her naked breasts. He was just grateful she couldn't see the tent in his boxers.
"Julian just sit on my legs" Jessica said matter-of-factly. "Just push your elbow into this spot" she said, pointing to her lower back again. "And use this oil so you don't hurt my skin please."
Julian climbed over his mother, who was wearing nothing but those white panties covering her buttocks, with his knees either side of his mother's hips, and his fiery erection jutting out under his boxers. He took the oil and placed some onto her sore spot. Then he bent down to apply his elbow. As he did, his hardness touched her buttocks. There was a thin layer of material covering his penis, and another covering her bottom, but the hard sensation against her slim, soft buttock was unmistakable. For them both.