They all left the next day. Lisa and Mike drove ahead in the car. David and Debbie were behind in the motor home. They would all meet together at the cabin later in the day. Even though David and Debbie left at the same time as their parents, they could not make as good as time driving the big RV.
Debbie had noticed that David seemed distracted as they were making their way out of town but she had assumed it was because of the city traffic. Once they were out of town Debbie figured that her big brother would be his old self.
After driving fifty miles, though, David was obviously deep in thought.
"Hey, Dave...what's on your mind? You haven't said three words since we left the house" she asked him.
Visions of his mother's hot action the day before were still vivid to him. Already his dick was straining at his cut-offs. He wasn't sure how he was going to handle being around his mom and all the family and having a hard-on at the same time.
"Oh, nothing really...Say, have you seen any good movies lately?" he said, trying to change the subject. His intent was all too clear to his sister who knew him so well.
"Bullshit that nothing is on your mind. Don't try to fool me, bro. I know you too well. Come on, 'fess up" Debbie was serious with him but still keeping a light tone.
"I don't think I should talk about right now" or ever he thought.
"You've always been able to talk to me about everything. Don't start holding out now."
"I mean it, Deb, this is really out there."
"Come on, Dave. What is it...your girlfriend's not knocked up is she?"
"No, that's not it. In fact when we went out last night we couldn't even have sex because her period had just started and its always so damn messy then. So not only is she not pregnant, I'm doubly horny"
"Doubly horny? What's that supposed to mean? Just because you don't get laid for one night you're all that horny? Besides, since when does being horny make you so deep in thought. You may be horny, brother, but there is more to it that you're not telling me."
She then just stopped talking and looked at her brother as though she knew that he would crack under her stare. He was starting to.
"Good lord, Debbie, you know me too well. I know that we have always told each other everything, but this is pretty heavy and really weird. For the first time, I really afraid that you will think badly of me"
Debbie looked at her brother sweetly. She could tell that he was agonizing over whatever was on his mind. She reached out her hand and gently stroked his face and hair.
"Dave, you know I love you and always will. Maybe talking about it will help."
"I doubt it, but alright, here goes..."
David started to tell the events of yesterday, leaving out very little detail. The more he talked the harder his cock became. He tried to wiggle in the driver's seat to get more comfortable. He hoped that Debbie wouldn't notice.
As he related the beauty of seeing their mom as a sexy woman with physical needs, Debbie too began to respond. She herself loved masturbating and did so often. It sounded like she and her mother used similar techniques. It never had occurred to her but she now supposed her mother was somehow better at it than she was because she had been doing it longer.
David was relating how he had seen their mother with the dildo in her pussy and her fingers in her ass. Debbie's pussy was now getting restless for something or someone to touch it. She squirmed a little in her seat. She hoped that David wouldn't notice.
When David started telling about his actions, he cutback on the amount of detail he used. Debbie caught on immediately.
"Hey, don't tell me everything about what mom did and how mom looked and then tell me you just jacked off. I want to hear it all!"
David looked over at his little sister. There was a look of lust in her eyes that he had never seen before. Her short hair framed a foxy face. Her white, close fitting sun dress obviously held a good looking body. His cock was now throbbing in his cut-offs.
"Alright. If you want detail, you will get detail."
He started that part of the story over. He had gotten out his dick and stroked it while watching their mom fuck herself. His cock had gotten harder, maybe harder and bigger than it ever had before. He even mentioned licking the clear drop of semen from the head of his dick.
Debbie caught her breath. She loved to do that to her boyfriend. She loved the taste of semen and cum and was always torn whether to let her boyfriend cum in her pussy or in her mouth.
Her pussy was now wet and the wetness was creeping down the crack of her ass. She subtly readjusted the way she was sitting. Her left heel came up under her. She hoped that it looked like she was sitting cross legged when in reality she was trying to rub her clit on her heel. It worked.
In between David's incredibly erotic tale and the gentle rocking of the RV on the road driving her foot against her clit, her pussy was now fully aroused. She knew from experience that she could hold herself on the edge of orgasm for a long time this way. She used to while away the hours in American History doing herself this way. The only problem was that the longer her held off her cum, the more difficult it was to hide.
David's story of jacking off and their mother's self-indulgence was taking its toll on her will power. Damn, her pussy felt good. She could feel the moisture making its way through her panties and sundress and onto her heel. She was right there. She could visualize her big brother stroking his hot cock. How hard and big it must have been. She imagined their pretty mother working her cunt over with the dildo. She could see David's cum shooting out. There was her mother driving the rubber dick into herself deeper and deeper. It was all so clear.
It occurred to her that David was no longer speaking. She looked over toward him. He was looking at her with a disbelieving face.
"You bitch" he laughed "Here I am pouring my heart out to your and you're sitting there bringing yourself off! I don't believe it!"
Debbie blushed and giggled. "I didn't think you would catch me"
"Not catch you? I would have to be blind with no nose not to know what you were doing" he laughed.
"Couldn't help it. What you were telling me got me so hot that I had to do something. I thought I could get way with it"
