Julie let herself down a little, until she felt the tip of Mark's cock nose into her pussy mouth. She only meant for just the tip to go in, but she couldn't judge it well, and by the time she realized it, it was half way in her.
Mark groaned and Sam flashed a picture. "Hold it right there ... don't move" he said as he repositioned himself for another shot. Julie tried to stay still, but by now her quads were on fire and she felt herself sag another inch. Mark's cock felt so good in her.
"I can't see ... you're too far down" said Sam and Mark groaned again as Julie dragged her pussy upward, stroking his prick nicely. The flash went off.
They took another break as Sam processed the photos. This time they didn't even go through the pretense of putting a robe on. They just stayed naked. Sam was using an L-7 Digital camera, so all he had to do was download the images and then flash them on the screen of the big 27" monitor. He and Lori were glued to the screen as they toggled through the batch.
Julie heard Lori gasp.
"That is so fucking hot" she squealed.
Sam said "And look at these two, with the penetration." He sounded so excited that both Julie and Mark went over to see.
As they approached Lori jerked her hand out of her pants, blushing. "Sorry" she said. "I can't help it. You two are so hot together. We're gonna sell a million of these books when people get a look at you two."
Julie stared in awe at the photos on the screen. There, in living color, was her brother, OK, step brother, really, with his cock all but buried in her aching pussy. She felt her pussy produce and leak some girl juice as she remembered the feeling.
Mark just said "Man!"
Sam turned. "The ones with penetration are so much better than the others. I know I shouldn't ask you to do this, but is there any way you would re-shoot some of those poses with penetration? I mean you won't have to move or anything. Just put it in a little and freeze."
Julie turned to Mark. His eyes were hot, looking at her naked body. "I'm game" he said. "I mean it's not like we'll actually be having sex or anything." His eyes said otherwise, but Julie felt the same way.
"I guess it would be OK" she said. "I sure hope Roger doesn't ever see one of these books though."
Lori started toward Mark, her hand already out. "OK, just let me..."
"That's OK" said Julie. "I'll take care of it. Sam, get your camera ready. We haven't talked about oral sex, but I know it's in there somewhere." With that she went to her knees in front of her brother and, without another word, put his cock in her mouth.
Mark went hard as stone in seconds. Julie, however, seemed to think it needed more stimulation. Sam had the camera flashing like crazy as Julie lovingly moved her lips up and down Mark's stiff cock.
Finally it was Lori who said "OK, OK, I think he's ready."
They went through each pose again. Each time Mark would carefully insert about half of his cock into Julie's pussy and freeze. Sam would take some pictures and they'd move on. It looked like it wasn't all that stimulating.
But no one had counted on Julie's pussy.
Mark found out very quickly that her pussy could squeeze his cock and milk it nicely without there being any outward sign that this was happening. Julie, for her part, didn't really realize she was doing just that. But as time went on Mark put just a little more of his cock in her each time, and he left it there just a little longer after Sam said they could change poses.
Finally it came back to the pose where the first accident had happened. Julie got up on the desk and draped her calves on her brother's shoulders.
Mark got ready to put his cock in her again and Lori said "Hey, wait a minute, we already got this one."
Julie said "Shoot it again, Sam" and that was all Mark needed to lean forward and slide his fuck stick into his sister's pussy. It was just too much for poor Mark. He didn't go a quarter of the way in her. He didn't go half way in her. He just stuck his prick in Julie until there wasn't any prick left. Julie sighed and her pussy muscles went to work on the invading bone immediately.
"Julie ... stop that" groaned Mark.
"Stop what?" she said dreamily, her pussy gleefully munching on his over stimulated cock.
"Stop squeezing my cock!" he groaned. "If you don't stop I'm gonna shoot."
"Shoot?" she repeated, her eyes only partly focused. "Shoot in my pussy?" she said.
"Ohhhhh fuck" moaned Mark as he heard her words. He leaked, letting some precum into her pussy.
"I mean it Julie" he said. "I have to take it out now or I'll shoot off in your pussy."
Nothing, of course, was stopping him from pulling out. Julie didn't have anything to say about it in the position they were in. He had all the control. But for some reason he found that his rod was still buried balls deep in her belly.
A very small part of his brain was wondering about that when her pussy rippled again and she said in a low, throaty voice. "You can't cum in my pussy, Mark, I might get pregnant."
And with that announcement, she dug her calves into his shoulders, lifting her pussy, slamming it up onto his spear of love. Mark lost it at once. With a whine he leaned forward and let his aching balls have their way. They pulsed, and a long silver ribbon of semen raced through his prick, leaping out of the little slit in the tip of his penis. That little slit was, at that particular moment, nestled between the lips of his sister's cervix, which meant that that long silver ribbon of semen splatted directly into his step-sister's womb.
As Julie gasped that she could feel him shooting in her, Mark produced six or seven more sticky ropes of baby butter, which he immediately injected into Julie's starving pussy. The feeling was so great that, instead of making his penis wilt, he felt even harder than before. He also felt the urge to fuck his sister, and he now let that urge go too. He began pounding Julie's wide open pussy with his engorged prick to her immense satisfaction. His warm and wet sperm had set her off on an orgasm when she felt it filling her up, and the added stimulation of his cock reaming her out made her almost pass out. She launched into a series of orgasms that left her gasping for breath and light headed.
Five minutes later she lay limp and weak as her brother announced that he was about to cum again.
He had time to ask her. He knew he should ask her. But he didn't. Instead, he carefully put the head of his prick as far in her as he could and, again, injected his seed deeply into her.
They both relaxed as he sagged forward onto her chest. Julie let her legs go down his arms, which he raised so she could wrap her legs around his waist. Neither of them made any move to remove his penis from her channel.
Both realized about the same time that there hadn't been any flashes from Sam's camera for some time now.
They turned, as one to look.
There, on the floor, was Lori, her naked legs spread wide, a pair of pale blue panties dangling from one ankle. Between those thighs was her brother's naked butt, which, at that very instant, was clenching mightily as Sam's own prick jerked and spat it's own load of brotherly incestuous cum into Lori's defenseless pussy.
Julie smiled and whispered in Mark's ear. "Looks like the book will perform it's intended purpose."
6 months later Roger got back from his deployment. He was met by his stunningly beautiful - and pregnant wife, who threw her arms around him and said "Baby and I just couldn't wait for Daddy to get back home."
She kissed him soundly and added "And you'll never guess in a thousand years who's coming to dinner tomorrow night."
She waited for the shake of his head. "Remember my brother, Mark?"
THE END
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