Note: This story was dynamically reformatted for online reading convenience. "She's out," Sandy replied adding. "But she knows all about this," "Does she really dear?" the Postman replies looking lustfully at the naked preteen. As if to answer Sandy tarts unzipping the postman's trousers and large boner pops up encased in white y-fronts. "Hmm!" she says. "That's nice," She undoes the postman's trouser belt with difficulty and he lifts his bum off the recliner so Sandy can lower his trousers. The old man lustfully holds Sandy's slim narrow naked hips runs his knurled hands over her smooth body mumbling to himself. His large erection in the underpants bumps Sandy in the face and she laughs. "Better get rid of these," she says and grabs the fabric at the edges on his old hips and tugs them down. A massive 10" penis springs up bobbing in front of Sandy's face the old man's tennis ball size balls hang swinging underneath. The head of the penis is drawn back but I can see he's uncircumcised and its reddish purple head is dripping pre-cum. His pubic hair is going grey like the hair on his head. The old man staggers back into the seat his penis slapping his belly, his trousers around his ankles. His hands are all over Sandy's little body my sperm still running down her legs glistening in the morning sunshine. The postman licks her little nipples and she laughs that is tickles. She pushes him back into the seat and climbs astride him. His giant cock at the groove of her bottom spreading it's pre-cum on the small of her tiny back. I am stroking my cock myself it's like watching a porn film in my own garden. Sandy raises herself up on her knees and scoots back the postman's cock bending back and down until it passes between Sandy's little legs and slaps his belly once more. "Can I fuck you little girl?" he asks lustily. "You'd better try," Sandy replies. "But it's a monster, better go slow," Sandy lifts herself up again until the head of his penis is between her legs and at her cunt lips. She lubricates herself with his pre-cum and what's left of my earlier deposited cream, and slowly tentatively lowers herself onto this monster. There's a slight gasp from both as the head disappears inside. "God it's so big," She gasps, but does not stop lowering herself inch by inch. After five inches she pauses for breath the Postman holds her hips his own hips moving slowly in a fucking motion. "God you're so tight little girl," he grunts through clenched teeth. "I'm going to blow my load soon," he warns her. "No not yet," Sandy replies pushing another inch into herself. The old man holds the cheeks of her tiny bottom in each hand as Sandy gives a final push and a scream and gasp. I look to see her fully impaled on the old man's cock. Both are gasping for breath. Sandy recover to sit upright looking over to me she sees me wanking furiously. "Come here Colin see how far this monster is in me," she tells me there are tears in her eyes but she is so horny. I go over cock in hand. Sandy leans back and I can see the outline of the postman's cock bulging my little sister's belly, and I cum on the spot shooting four large gobs of sperm all over Sandy's distended stomach which she rubs it in the feeling making the postman start to bounce her and fuck her like a little doll. I stand back spent my cock wilting slightly. Sandy starts to bounce and ride the massive intrusion in her and quickly orgasms with a scream and falls forward onto the old man. He holds her bottom cheeks and I see him start to pound her little hole his cock hammering into the preteen. Sandy quickly recovers and bounces along with him and is soon riding him like a cowgirl. "Cumming!!" he gasps. And I see his massive balls contract and he gasps three or four times as he empties his balls into my little sister who has another orgasm at the feeling of the old man's sperm shooting into her. She falls like a rag doll onto the old man her body covered in sweat the old man's finger prints on the skin of her bottom where he's held her tightly. I notice he is still fully embedded in her and his sperm trickles down from her little hole onto his balls. "God you were amazing," he tells Sandy quietly stroking her hair. Sandy moves realising that he is still hard in her little body. "He mister your cock's still hard," she states the obvious, moving slowly. She reaches behind herself and feels the man's huge balls. He gasps. "My late wife always told me I was always a two or three times a night man," Sandy giggles "Goody" and starts to bounce again. She looks over to me and sees I'm sporting another erection. "Come on Colin give me some more of your juice," "God you are amazing," the postman gasps as Sandy slides up and down his massive pole. Sandy takes my cock in one hand and steadies herself with the other on the postman's potbelly. She masturbates me quickly until I feel my balls boiling once more and she sprays my cum all over her little chest and belly. Her little belly bulges at the massive cock banging into her but he moans happily and I stagger backwards not wanting to miss any of the action. Because the postman has so recently cum it takes longer this time for him to cum and Sandy screams her way through three more orgasms before he grunts. "Here it comes little girl," "Give it me give it me," Sandy wails bouncing feverishly on the old man's lap. He grunts and his balls contract and he shoots maybe four loads of spunk into Sandy who falls forward and the postman's cock slips out dribbling spunk and looking red and angry. "Wow!" he gasps. "That was fantastic," Sandy kisses him on the cheek. Just then the front door opens and mum comes in. I come in the front door and I'm met by Colin naked as usual his cock semi-hard again as usual and he tells me to be quiet and follow him to the patio. I find my little girl Sandy lying naked on the lap of a semi-naked pensioner postman his trousers around his ankles his massive cock lying limply obviously just from being in my little girl's body. "Hi mum," Sandy looks up. The Postman is frozen in terror trying to get Sandy off him as quickly as possible. "It's okay," I say reassuringly "If it's what they want fine and she's not hurt, that's quite a big cock you've got there," "I'm fine mum," Sandy says "What a good fuck he is," The postman visibly relaxes more and Sandy sits astride him playing with his limp cock which must be six inches long and thicker than her wrist. "He cummed in me twice," Sandy tells me. "God he felt massive," I notice Sandy's little hole is red and sperm is trickling from it and her little clit is standing proudly but she appears to be fine. "Cup of tea?" I say to the postman he looks like he needs one. "Thanks Mrs," he says sheepishly trying unsuccessfully to stop Sandy playing with his flaccid penis. "Colin help me with the shopping while your sister finishes up," I turn to head for the kitchen leaving my little preteen daughter to play with the postman's limp dick. Colin helps me put the shopping away I notice his penis never seems to go completely limp I think it must be the resilience of youth. I make the postman a mug of tea and a couple of chocolate digestive biscuits, and go out only to find Sandy with half the man's cock down her throat her mouth straining to get it all in. The postman has his eyes shut as he gently rubs her hair. Just then he grunts. "Cumming!" and Sandy lifts her head totally ignoring Colin and me. The Postman still has his eyes closed as his third orgasms hits him and Sandy wanks him furiously all over her chest and belly and five ropes of thick cum cover her. He opens his eyes and gasps for air. "That's three times," Sandy says brightly massaging the spunk into her tanned little body. "God you've killed me," the old man gasps. "But what a way to go," I add putting the biscuits and tea down beside the old man. He jumps still uneasily, but I motion for him to relax. Sandy get up off him and helps him pull his trousers back up giving his cock a last kiss. "See you soon," she says to his cock as she pulls his y-fronts over it. The old man flinches his cock is still very sensitive. When he is dressed he sits and drinks his tea and Sandy shares a biscuit with him still sitting on his clothed lap, and still naked as the day she was born. The Postman Malcolm was his name thanks me profusely and asked me why and I told him my story, and I told him he was welcome anytime as long as he kept it a secret and didn't do anything Sandy didn't want to do. Just then we hear footsteps and Malcolm looks nervously at the naked little girl on his lap his fingers absentmindedly diddling Sandy's clit much to her joy. "It's okay I tell him it's only her sister and brother," he gasps. With that a naked well fucked looking Debbie appears beside her equally well fucked worn out brother Brian his little cock red and looking worse for wear. "Hi mum," says Debbie kissing me on the cheek. "Just had this amazing session with Brian he fucked me five times before he went soft," Malcolm groaned his eyes scanning the well fucked slim girl now in front of him. "What a family," he muttered. "Who's this?" Debbie asked not trying to cover her nakedness. "This is Malcolm the Postman dear," I told her. "You're sister's new friend," "He fucked me two times," Sandy says brightly, "And I sucked him once as well...see!" Sandy shows off her spunk covered little body to her equally naked spunk covered sister. "He's got a massive cock," Sandy tells her sister. She holds up her hands like she's measuring a fish. "Wow!" says Debbie. "Any for me Mister?" she asks facing him asking in a little girl way. "Leave the man alone," I tell her rescuing Malcolm who I am sure was willing but his cock looked knackered when I saw it before. "Better go and finish my round Mrs," Malcolm saying staggering to his feet leaving Sandy to rub her own clit sighing. "See you tomorrow?" both girls say. "Oh God," he says. "If your mum says so," "Whatever you know the rules," I say. "See you poppet," he kisses Sandy and smiles at Debbie running his fingers across her flat chest as he goes past her. He picks up his bag and is gone. "Just gonna go and ring Joan," I tell my lot. The kids go off to the garden to play normally as they seem to have satiated themselves for the time being.