Mark sat naked in front of his computer, staring at porn images of mothers and sons fucking together on one of his favourite incest sites. With the mouse in his right hand and his hard cock in his left, he went through the images one by one, whistling with admiration whenever a particular picture excited him more than usual.
"Wow, Brett," said Mark, "will you come and look at this?"
Brett, who had been lying naked on the bed masturbating as he thumbed through a porn mag, lifted his nineteen years old body from the mattress and walked over to join his twin brother who was now masturbating as if his life depended on it.
"Bloody hell," said Brett, matching Mark in the masturbation stakes stroke for stroke, "look at the size of that guy's prick."
"Yeah," said Mark, "any mother would be proud to have a son like that. Still, he's not as big as I am."
"Nor me," said Brett.
Mark glanced at his brother and smiled. "I suppose yours is quite big, bruv," he said, "but it ain't as big as mine."
"Piss off!" said Brett, good naturedly, "you know darn well I'm the biggest of the two of us."
"Let's prove it," said Mark jumping up, "get your butt over here."
Brett followed his brother over to the long wall mirror and the two stood naked together in front of it, staring at each other's aroused pricks. "There you are," said Mark, "I've an extra inch on you."
"Nonsense!" replied Brett, retracting his foreskin so that his pink knobhead glistened in the lake of sunlight that was flooding through the open window of their shared bedroom, "I'm the biggest and you know it."
"The hell you are," retorted Mark.
"OK, then," rejoined Brett, "if you don't believe me, let's go and ask mum. She'll tell us the truth, you can bet on that."
"Where is she?" asked Mark.
Brett moved over to the open window and glanced out, his eyes lighting up as bright as the sunshine at the sight which greeted him. Mark moved over to the window too and, like Brett, his face broke into a smile at the sight of their mother, sunning herself on the sun lounge, like Mark and Brett completely naked.
"Fucking hell," said Mark, "mom's tits seem to get bigger every day."
"Shall we go and ask her or not?" said Brett.
"Yeah, come on," said Mark and the two brothers made their way out of the house onto the patio where their mother Janice dozed drowsily in the early morning sun.
"Mum!" cried Brett as they approached her. "You awake?"
"Well, I was having a snooze," Janice replied, opening one eye and then, seeing her naked sons standing unselfconsciously in front of her with their hard cocks pointing directly upwards, her other one, her face breaking into a smile. It was lovely, Janice always thought, how the three of them were happy and confident in their shared nudity as befitted a family that was firmly in tune with one another and, though she was biased because she was their mother, the two hard pricks now openly on display were, Janice was very much aware, the most beautiful she had ever seen, big and hard and pulsating with life.
"Mum, Brett and I want to ask you something," said Mark.
"Oh, not again," said Janice, who knew what her sons were about to say, "you ain't arguing about that again, are you?"
"We just want to know, mum," Brett went on. "Which one of us has the biggest prick?"
"Goodness me," said Janice, shifting herself slightly on the sun lounge to get a better look at her handsome sexy boys, which was how she still thought of them though it was patently obvious from the way they stood there naked and erect that they were no longer boys at all but definitely Men - with a capital M.
"I've told the pair of you before so many times," Janice went on, "you are both as big as each other. And it wouldn't matter if one of you was bigger than the other, its what you do with them that counts."
"Oh we know what to do with them, mum," giggled Mark.
"Yeah," laughed Brett, "much better than dad ever did."
A frown swept across Janice's otherwise pleasant features. "Now, as well as telling you many times about how big you are, I've also told you many times not to mention that man again. He left us a long time ago, the rat, running off with that floozie, and I don't want to talk about him."