Kristen rubbed the jism into the soft skin of her tits and stared in awe at her brother. He was still apparently as horny as hell and his prick as still hard. She realized that he wasn't going to lose his hard-on.
'Jason, take those trunks off,' she said. 'Take them off!'
Jason gaped at her, then did as he was told, pulling down his swimsuit and kicking it off his feet.
Kristen quickly stripped off the bottom half of her bikini and tossed it onto the grass. She folded another towel to make a better pillow for her knees and placed it on the blanket.
'Get ready to fuck me, Jason!'
Kristen positioned herself on her hands and knees, dog-fucking style, with her round ass turned toward her brother and the house. Her big tits dangled beneath her, the stiff nipples brushing the coarse wool of the blanket. Then she flopped down on her elbows, spreading her thighs and hiking up her ass to offer Jason the bulging gash of her pussy. Peering back over her shoulder, she eagerly eyed his cock.
'C'mon, Jason! Fuck me!'
Jason got up on his knees behind her, his prick bouncing wildly, and placed his hands on the rounded cheeks of her sweet young ass. He stared down at her luscious pink pussy.
Grasping his quivering prick with his hand, Jason guided the swollen cock-knob between the lips of hr pussy. Kristen winced as she felt the enormous cock sinking into her body, stretching the tent walls of her pussy, filling her cunt with ten hard inches of rigid prick.
'Ooopooh, Jason! You're so Goddamn big! Every tune you put it in, it feels like you're splitting me in two!'
Baring her teeth, Kristen clutched at the blanket and began squirming, twisting and grinding her ass in a circle, enabling her brother to shove every last inch of his massive cock into her tight little fuck-hole.
'Jason, you're in me! God, it feels so good! Oh, Jason, fuck me, fuck me!'
She continued to twist her body from side to side, shaking her plump white asscheeks, fucking her brother's invading cock with her tight, wet pussy.
'C'mon, Jason, fuck me!' she moaned, wiggling her hips insistently. 'You're all the way in – not fuck me!'
Jason drew back and then thrust himself forward, ramming all of his stiff prick, into the yielding folds of his sister's cunt. His bloated cock-head bottomed out deep inside her sweet young body, making her shudder and shake like a gaffed fish. She began fucking him wildly, rising up on all fours and even bouncing her knees off the blanket in her frantic desire to be reamed and rammed by her brother's plunging prick.
'Fuck me, you bastard!' she screwed in her frenzy. 'Fuck my cunt!'
Her screams were too loud – loud enough, in fact, to be heard inside the house. But Kristen was past caring whether anyone heard her or not.
Her pendulous, low-slung tits swung crazily about as she repeatedly jerked her ass up to meet her brother's thrusts, taking his pounding prick again and again into the depths of her sopping wet cunt.
'Fuck me!' she squealed, her voice shrill. 'Fuck me hard, Jason! Oh, God! It feels so good!'
Jason fucked his voluptuous sister as hard and as fast as he could, banging her almost brutally, slamming his huge cock again and again into her steaming pussy. He held her slender ass with both hands and yanked her toward him with every thrust, slapping her ass noisily against his belly. And finally Kristen began to reach her climax.
'Jason, I'm coming! Oh, shit! Fuck! I'm coming! I'm coming! Ahhhgggggg!'
Her cry of pleasure was a blood-curdling yell. Kristen threw her face down onto the blanket and flung her ass back against Jason, taking him deep. Her pussy muscles spasmed rhythmically around her brother's deeply buried prick.
And now Jason began to come too. He clutched her ass against his body with all his strength, forcing his cock into her pussy as far as it would go. The sudden gush of his jism shook them both. Kristen sobbed with ecstasy as she felt the thick jism squirting into her cunt, coating the tender lining of her tortured pussy like a bath of healing lotion.
And then she heard her mother's voice from just inside the house.
'Oh, my God! Jason! Kristen! What are you doing?' Helen cried.
The screen door slid open behind them. Responding automatically, Jason yanked his still-oozing cock out of his sister's pussy and turned toward the door. Kristen rolled over onto her side, a triumphant smile on her face.
Helen was standing in the doorway, her face white with shock as she gaped in disbelief at her two naked children, her eyes moving from Kristen's sopping pussy to Jason's dangling prick.
And ten she turned and ran back into the house.
CHAPTER EIGHT
It was almost more than Helen could bear. She just couldn't get over the awful shock of catching her son and daughter fucking in the back yard. The picture of Jason's muscular ass flexing as he jammed his cock into his sister would be etched in her mind forever.
She kept replaying the scene in her memory – the way Jason had turned to face her with a look of horror in his eyes, his stiff red prick still oozing jism after popping free of Kristen's wet pussy.
Helen didn't know what to do. Her mind was a whirlpool of conflicting emotions. Jealousy, anger, guilt – but most of all, a sense of betrayal. How could Jason have cheated on her that wat – after all the beautiful moments he had shared with his own loving mother? How could he have done it?
Quite a few days had passed since the terrible scene in the back yard. Helen still hadn't spoken to either of her kids about what she had caught them doting.
Helen had returned to the scene of her children's misbehavior. She was lying on a chair in the back yard, sunning herself, wearing a pair of sunglasses and the bottom half of a tiny bikini, get billowing white tits were exposed to the warmth of the brilliant afternoon sun. Feeling the heat, she picked up a bottle of suntan lotion, squeezed a drop into her palm and smeared the gooey fluid over the broad expanse of her quaking, bobbling tits.
And she heard a voice.
'Uh, Mom.'
It was Jason, of course. Helen craned her neck around and saw that he was standing just inside the screen door.
'Yes, what is it?' She lay back on the chair, making no attempt to cover her gorgeous tits.
'Can I talk to you for a minute?'
'Of course, Jason. I've been wanting to talk to you, too.'
The screen door slid open and Jason stepped outside, closing the door behind him. He came up and stood beside the chair.
'Mom? It's about me and Kristen.'
'Oh, really?' Helen remained impassive, her eyes shut tight against the sun.
'Mom, I'm sorry. I don't know how it happened. I mean, I just couldn't help myself.'
Helen felt a rush of anger. 'How long has this been going on?'
'Not long at all. Honest. It only happened a couple of times. Mom, I just couldn't help it!'
'Oh, you couldn't!' she snapped. 'And why was that? Is your sister's body so irresistible?'
Jason could only shake his head and shrug helplessly.
'Is your sister's body better than mine?'
'Oh no, Mom! No way!'
'Are you sure about that?'
'Yes, Mom. Honest! You're still the most beautiful woman I've ever laid eyes on.'
'Do you really mean that, Jason?'
'Of course, Mom. You know I do.' Helen felt her anger ebbing away. 'Then promise me something, Jason. Promise me you'll never fuck your sister again.'
