"Hey, Sport! Come on in!" Billy's grampa said. The tall, white haired, 68 year old man stepped back and held the door open so 5 year old Billy could enter, followed by his daddy, Roger. Roger set Billy's backpack on the floor in the front hall.

"Thanks for taking him, Dad," Roger said, "You're sure it's not a problem?"

"No, of course not," Phil, Roger's father, replied, "With your mom visiting Aunt Karen, we'll have a men's night all to ourselves, right Buddy?" Phil said, ruffling the little boy's blonde hair in a big hand.

"Yeah!"" Billy answered, smiling shyly.

"Well, you be good for Grampa, okay, Buddy?" Roger said to the child, "You be sure to do everything he says."

"Okay, Daddy," Billy said. The cute little 5 year old knew to do what he was told. His daddy and his Uncle Mark had made that clear when having sex with him, or when telling him to suck their cocks. He was supposed to obey older men.

Fortunately for the little boy, he loved sex, and eagerly obeyed his daddy and uncle. Especially if it meant being allowed to swallow their cum.

Phil closed the door and led Billy into the house, carrying his back pack.

The two ate dinner - chicken nuggets and French fries - and sat together on Phil's big couch to watch baseball. Billy grew bored, and leaned against his grampa's side, trying to stay awake.

"Maybe you should put your PJ's on in case you fall asleep, Buddy," Phil suggested. Billy nodded, and went to his backpack. Phil helped him to open it and extract his pajamas.

Billy slipped his shorts down and off, along with his tight white underpants. He pulled off his t-shirt and stood unselfconsciously naked in front of his grandfather. Phil watched as the little boy picked up his PJ bottoms, a pair of stretchy shorts with tigers on them. They were very tight, and when Billy pulled them on, his round butt cheeks peeked out of the back, and the soft, thin material formed itself around the small bulge of the child's genitals on front.

"Those are getting a little small, aren't they?" Phil asked, staring at his half-naked grandson. The boy's soft skin was pale and clear. A few light freckles dotted his shoulders. Phil's eyes travelled down the boy's slender body, pausing at his hard pink nipples, and the deep depression of his navel. The boy's legs were thin, but well-formed.

He tore his eyes back to Billy's face, and saw his grandson's big blue eyes staring back.

"I like them," the boy said simply, referring to his pajamas.

"No shirt?" Phil asked.

"No, It's too hot ," the boy explained, "Can I sit in your lap, Grampa?" Phil opened his arms in invitation, and the little boy climbed into his grandfather's lap, settling down with a little wiggle of his firm round butt. Phil shifted uncomfortably when he felt the child's ass cheeks against his growing erection. When Billy finally settled down, Phil's long hard cock was nestled in the crack of Billy's ass.

Billy wiggled around quite a bit, and Phil wondered if the boy could feel his grandfather's hard cock against his butt.

The 5 year old leaned back against Phil's belly with his bare legs spread apart, hooked over each of Phil's thighs. Phil had to put a hand around Billy's waist to hold him on his lap, and he felt the soft warmth of the kindergartener's stomach against his palm.

Billy wiggled again, rubbing his ass crack against Phil's hard cock.

"What's the matter, little man?" Phil asked.

"These are too tight," Billy complained, pulling at the waist band of the shorts where they dug into his stomach. Phil rolled his eyes.

"Why didn't I think of that?" he asked rhetorically.

"Gotta take 'em off," Billy said, jumping from his grandfather's lap. He pushed the shorts down and stepped out of them. Phil got a great view of the boy's wrinkled pink anus when he bent at the waist in front of him.

The older man stiffened when Billy clambered back into his slap, naked.

"Uh," he said nervously. Billy settled back into position with his legs splayed apart. He grabbed Phil's wrist and pulled it around his waist, resting his grandfather's palm on his warm soft abdomen, lower than it had been before. Phil could feel the heat from his grandson's belly against his palm, and his cock twitched under the boy's firm, warm ass.

Phil tried to concentrate on the game, but motion caught his eye, and he glanced down to see Billy squeezing and pulling his little penis. The inch-long organ was hard, and the boy pulled on it idly as he watched the game.

Phil tried not to stare, but he couldn't tear his eyes away from the delightfully, innocently erotic sight of the 5 year old blonde boy playing with his little erection.

After a few minutes, the grandfather returned his attention to the game, until he felt Billy's small hand on top of his. Slowly and gently, the kindergartener pushed his grandfather's big hand down toward his crotch. Phil felt the heat of the boy's little sex organ on the side of his hand, and sighed as he cupped the boy's immature genitals with his palm. Billy lay back against his grandfather's belly with a sigh of his own, humping against the man's hand.

Phil closed his hand around the little boy's penis, taking it between two fingers and his thumb to pull it gently. Billy moaned, and Phil felt the boy's hands rubbing the tops of his thighs. When Billy moved his hips, Phil felt his ass rubbing against his cock.

"Grampa," Billy asked quietly, "Can I have a kiss?" Phil looked down at the child, who had turned to look up at him over his bare shoulder. He looked sweet and adorable. His blue eyes were huge, and his soft face was outlined by his light blonde hair.

"Sure, Buddy," Phil said huskily. Billy turned and faced his grandfather, kneeling on his upper thighs. The boy pressed his lips against his grandfather's mouth, and Phil was surprised when he felt his grandson's small, hot tongue slide between his lips and into his mouth. Phil grabbed Billy's ass cheeks tentatively in his hands and kissed the boy back, sliding his thick wet tongue into Billy's mouth and tasting his sweet saliva. Billy put his arms around his grampa's neck and moaned into his mouth, sucking his tongue lustily. Phil squeezed Billy's bare ass more confidently, and Billy pushed back against his grandfather's hands.

"Mmmmmm, Grampa?" Billy muttered against Phil's wet lips, "Can I suck your cock?"

Phil froze. The mature, illicit words coming from the child's lips were shocking and erotic. He was stunned. He knew what he wanted but he was terrified of actually doing it.

"Please, Grampa?" the boy begged. That did it. Phil moved the boy to his side and fumbled with his zipper, sliding his pants down with his underwear to free his hard, aching cock.

Billy jumped to the floor and stood between his grandfather's knees, bending at the waist to grab Phil's seven inch cock in his hands and kiss the bulbous head. Phil watched the little boy lick the length of the shaft, pulling at the hard rod with both hands.

The man let out a long, low groan when his grandson took his cock in his hot mouth. The little boy's blonde head bobbed in his lap as he sucked his grampa's cock.

"Oh, Baby," the man gasped, "That's great. What a good boy you are! Suck Grampa's cock, Baby!"

Billy moaned and cupped his grampa's hairy balls in one hand. Phil pushed his cock into the boy's mouth, fucking his face as the boy sucked him. He was nearing an orgasm when Billy pulled his mouth off his cock.

"Do you want to fuck me, Grampa?" he asked sweetly.

Phil almost came right then. He stared at the boy's expectant face, thinking.

"Oh, yeah, Baby Boy," the man decided. He scooped the naked 5 year old up in his arms and carried him upstairs to his bedroom. Billy put his arms around Phil's neck, and Phil toyed with the little boy's penis as he ascended the stairs.

Phil laid the boy on his queen size bed, and Billy spread his legs, showing off his little cock and balls. Phil kept his eyes on the naked boy as he fumbled in his nightstand for the lubricating gel he kept there.

Billy smiled and rolled over on his tummy, grinning over his shoulder invitingly and sticking his ass up in the air. Phil stripped off his shirt and socks, kneeling behind the naked little boy and gazing down at his pale, round ass cheeks. When Billy stuck his ass up, the creamy globes separated, exposing his tight pink anus.

Phil squeezed some gel on his fingertips and rubbed them against Billy's asshole. Billy moaned and pressed his butt back against his grandfather's fingers.

"Wow," Phil said, "You are a horny little slut, aren't you,"

"Horny slut," Billy moaned in reply, and Phil pressed his index finger into the boy's anus. It slid in easily on the film of lubricant. Phil loved the hot, soft feel of the child's anus against his fingertip. He spent a few minutes sliding his finger in and out of the boy's tight asshole.

"Please fuck me now, Grampa?" the boy whined. Phil squirted some lube on his cock, smearing it around the fat head. He levered himself over the small boy and leaned on one arm while rubbing his slick cock head against the boy's anus. He pushed forward, and his cock head popped right in past the boy's sphincter.

Phil was surprised at the ease of penetration into the ass of such a young boy.

"You do this a lot?" he gasped as he settled over Billy's prone body. He supported himself on his elbows, so he didn't crush the small body below him. Phil felt his grandson's warm back against his belly, and the delightful feel of his firm ass cheeks rolling under his hips as he thrust his cock into the child's anus.

"Uh, yeah," Billy grunted under the pressure of his grandfather's cock thrusting into his asshole, "Daddy and Uncle Mark fuck me all the time."

"Oh, God!" Phil gasped. The knowledge that his sons were fucking his sexy little grandson was too much, and his cock exploded into the boy's rectum.

"Oooooo, Grampa!" Billy squealed, "I can feel your cock squirting in my asshole!"

"Ahhhhh, Fuck!," Phil gasped and grunted. He came harder and longer than he had in years. Billy's asshole squeezed and milked his cock in a way his wife Margaret's pussy never had.

The elderly man lay atop his grandson, gasping and panting, waiting for his heart to slow down before rolling off the boy's body. When he turned onto his back, his cock popped out of the kindergartener's grasping anus, leaving a trail of sperm across Billy's ass cheek and Phil's hip.

Billy climbed to his knees and bent over Phil's crotch to take his grandfather's warm, slimy cock into his mouth. Phil watched unbelievingly as the 5 year old slurped the semen off his cock, straight from his own asshole.

Phil let his head fall to the mattress and was asleep before Billy finished sucking him clean. Billy went to the bathroom to pee, then climbed back in bed with his Grampa, pulling the sheet over both their bodies before cuddling up to Phil's side and falling asleep, too.

- - - - - -

Phil awoke in the morning to the feeling of his 5 year old grandson sucking his cock. He was hard already, and Billy kept him that way, pulling at his cock with his fist while sucking on the end and fondling the man's balls with his small hand.

When he saw that his grampa was awake, Billy smiled and got up on Phil's chest. The slender boy leaned on Phil's chest, and rubbed his little cock and balls against Phil's erection. Phil loved the soft, warm feel of his grandson's underdeveloped genitals against his hard cock.

Billy stared into his grandfather's eyes as he reached between his legs and gripped the man's seven inch erection in his small fist and leaned back, rubbing the spongy head against his asshole. Billy's eyes closed in concentration as he pushed back against Phil's cock, which slid into the boy's rectum on the glaze of semen left in his ass the night before.

Billy and Phil groaned at the same time as the boy settled down on his grandfather's cock. Phil was surprised how much of his cock disappeared inside the small boy's body. Billy started bouncing on his grandfather's cock, fucking himself with abandon on the hard, hot pole.

Phil took the boy's hard little cock between his fingers and pulled it while the boy took his cock deeper and deeper in his asshole.

"Oh, uh, ahhhhh," Phil gasped, "You're gonna make me cum again already! Oh, fuck!" Phil shouted.

"Cum in my mouth, Grampa!" Billy cried, "I wanna taste your cum!" The boy pulled his ass off his Grandfather's cock and knelt next to him. He gripped the man's swollen cock in both small hands. The kindergartener clamped his soft pink lips around the head of the gasping man's cock and jerked on the oily shaft.

Billy was soon rewarded by a warm flood of sperm on his wet pink tongue. He moaned and looked at his grampa with his big blue eyes as Phil's cock drooled cum into his mouth.

"Oh, God!" Phil groaned, lying flat on his back. Billy swallowed the slimy load in his mouth, then licked his grampa's cock and balls, enjoying the musky scent.

"Ooohhhhh," Phil moaned after he had recovered his senses, "How about some breakfast, Baby Boy?"

Billy smiled at his grandfather, his lower lips shiny with sperm.

"Okay, Grampa," he agreed, "Then can we fuck again?"

Phil groaned again. It was going to be an interesting morning.