Shari was quick to comply, her rounded little ass dangling over the edge of the bed, her feet on the floor. She opened her legs wide. "I don't see how it's gonna work this way, Mom. Shouldn't I be on my hands and knees?"
"It will work," she replied. "Trust me."
She had Bobby get on the floor between his sister's spread thighs. "Draw your knees up to your sweet tits, Shari," Joyce instructed.
Shari did so, and the action caused her ass to lift. Her sweet young cunt was revealed as was the tight pucker of her asshole. She held her legs by her knees, holding her head up to watch, eyes wide and glowing with anticipated pleasure. She was already breathing swiftly, her small tits rising and falling as her excitement increased.
Joyce stood on her knees at Bobby's side, her hand holding his cock at the base. She pulled his prick forward and rubbed his swollen cock head about Shari's flexing asshole.
"Oooo, nice!" Shari gurgled when she felt his prick there. "It feels good so far, Mom!"
Joyce placed one hand on her son's ass as she held his cock against Shari's asshole. She pushed with her hand, watching the swollen head of his cock press against the pucker of Shari's asshole. "You have to shove harder, Bobby," she said. "It's harder to get in an asshole than a cunt! Push harder… it will go in!"
Shari was shaking with this new pleasure, already mewling softly. She felt her brother's cock pressing harder against her tight asshole, and his touch sent a ripple of ecstasy flowing through her naked little body. She held her ass up for him, her eyes becoming unfocused.
"Push, Bobby!" Joyce urged, pressing against his ass. "It's almost there! Push it up her asshole!"
Bobby pushed hard, his own eyes wide as he stared down. He looked at Shari's tender cunt and saw the way her clit glistened. He could also see the head of his cock sinking into her asshole.
"Ohhhh!" Shari grunted.
Bobby's cock slipped into the tightness of his sister's asshole, and his prick went all the way in, pressing his mother's hand between Shari's hot little ass and his balls.
"Oooo! Ohhhh!" Shari whimpered, her face twisting with momentary pain. "Is it all in me? Does Bobby have all of his cock in my ass, Mom? Ohhh, it sure feels big in there! Oooo, it feels good, too!"
"It's all the way up your ass, darling!" Joyce said in a husky voice. She took hold of her son's balls and tugged lightly at them. "Fuck her, Bobby! Fuck Shari in her asshole now! My God, that looks so beautiful! Fuck her, baby, fuck your sister's cute, tight asshole!"
Bobby began thrusting his cock in and out, his hands resting on the smooth backs of Shari's thighs. He could hardly believe the hot tightness of her ass. The puffy lips of Shari's cunt were wet, and he could not resist running his fingers over them as his cock fucked in and out of her gripping asshole.
Joyce stared with hot eyes, gripping her son's pumping ass in one hand and his balls in the other. "Fuck it for her, Bobby! Fuck her little ass good and hard!"
Shari was squealing with the intensity of this surprising pleasure. Her asshole felt as if her ass were on fire, burning up. But the sensation was so good she did not want his cock pulled out under any circumstances. She wiggled her ass against him, mewling and whimpering with delight.
"Oooo, wow. This is good, Mom!" she squealed in a pleased voice. "I like it, I like it! Fuck my ass, Bobby! Oh, fuck me up my ass! I had no idea it would feel this good, being fucked up the asshole! Fuck it, Bobby!"
Joyce saw her daughter's hand race down between her thighs and watched as Shari began to fingerfuck her slippery pussy as Bobby drove his cock deeply up her ass. She was overjoyed at the reaction of her children, never dreaming they would be so damned erotic, so willing to engage in every act of sex imaginable.
"Bobby, Bobby," she whimpered in a thick voice, "Fuck her little asshole! Oh, honey, fuck Shari's tight, little oh-so-hot asshole! Fingerfuck your cunt, Shari! Doesn't that feel wonderful… fingerfucking your cunt with Bobby fucking you up the asshole?"
"Ohhh, it sure does, Mom!" Shari wailed, writhing her ass wildly. "I wish… I wish I had a cock in my cunt, too! Both at the same time! Oh, Mom, I'd die with so much pleasure for sure!"
Joyce knew the feeling. She gripped her son's ass cheek tight, still clinging to his balls, watching his cock fuck back and forth, seeing Shari's finger diving in and out of her scantily haired pussy. She loved the hot sounds they made, sounds that filled the room. She loved the movements and twistings and murmurs of intense delight. She was almost completely satisfied to watch them fucking but not quite. She wanted something up her cunt and asshole too, but she would not take this pleasure away from her daughter. She knew her turn would come later. She wanted her children to enjoy all this wild, abandoned sex to the fullest. Joyce knew she would not be ignored.
Bobby plunged his cock deep into his sister's ass, grunting with the hot pleasure. Shari's eyes were still wide with the surprise of this ecstatic sensation, and she was gurgling hotly. Her finger stabbed in and out of her cunt, now and then drawing up to rub almost brutally at her swollen, throbbing clit.
"Fuck me, fuck me, fuck me!" Shari wailed as she tried to throw her naked little ass higher. "Ohhh, I love it… a cock up my asshole! Fuck my ass, Bobby! Ooooo, fuck my asshole! I think I'll come pretty soon! Fuck me in my hot ass, Bobby! Oh, fuck me in my hot fucking asshole!"
"Uh… uh… uh!" Bobby grunted, his fingers digging into his sister's thighs now. He was straining hard into her asshole, gasping hotly.
Joyce, still holding the cheek of his ass tight in her hand, his balls in the other, was licking at her lips as pleasure rippled throughout her naked body. She could feel her own cunt bubbling wetly, the insides of her thighs becoming slippery. Her tits were very swollen as she pressed one against her daughter's thigh and the other at her son's hip.
"Fuck your sister's asshole, baby!" she urged hotly. "Ohhh, that's beautiful, watching your hard cock fucking Shari in her asshole! My God, it's going to make me come, too, just watching! Give it to her, Bobby! Give Shari all that hard cock! Ohhh, such a sweet, hard cock, baby! What a wet, hot cunt you have, Shari… and such a hot asshole! Fuck her, Bobby, fuck her good and hard! Squirt it up your sister's ass! Come in her hot fucking ass, baby!"
"I will, Mom!" Bobby shouted as he pumped his cock in and out furiously now. His body was shaking and she could feel his balls becoming very tight in her hand. "I'm gonna come up her ass! I'm gonna shoot it right up Shari's tight fucking asshole, Mom!"
"Yes, yes!" Shari squealed as she rocked her naked ass in all directions. "Come in my asshole, Bobby! I wanna feel you coming up my tight asshole! Oooo, I'm gonna come too! My pussy is gonna come, too! Ohhh, I think my asshole is gonna come… it feels so fucking good!"
"I'm doing it!" Bobby shouted suddenly, ramming his cock hard and deep into his sister's asshole. "I'm coming, Shari! I'm coming up your asshole!"
"I feel it!" Shari shouted, her naked little body trembling violently. "I feel your cock squirting up my ass hole! Ohhh, it feels good! Your cock is filling my asshole up, Bobby! More, squirt some more in me! I'm coming, too!"
Shari's finger was fucking in and out of her flexing cunt, and Joyce could almost feel it herself. Her cunt was steaming, but she did not come. Her immediate pleasure was in the sight of her two children. Her hands gripped Bobby's balls tightly, but the one on his ass had gone, now squeezing her daughter's shaking ass.
Bobby became so weak he could no longer stand on his knees. His cock slipped from his sister's asshole with a soft, moist pop and he sat on the floor, gasping heavily. Shari's legs came down and she lay there, her knees wide apart, her naked body trembling. Her face held the expression of a young girl that had just experienced one of the most ecstatic feelings a person could have.