Note: This story was dynamically reformatted for online reading convenience. There standing in the doorway was my youngest daughter, Kim. She was staring straight at her sister and me sitting in my office chair and Lucy impaled on my rock hard cock and a kiddy-porn video had just been playing on the PC. "Are you guys fucking?" She asked without any hesitation and a hint of a smile of her face. "Kimmy get out! What are you doing here?' I stuttered in complete shock at having been caught fucking my preteen daughter. Making it worse I was caught by my other daughter. Kimmy just stood there determined to get an answer. 'What does it look like we're doing?" Lucy replied without any hesitation or concern we had just been caught. "You are! You are fucking! Wow! It looks like fun. Can I play as well?" Kim asked with glee jumping up and down. Next her head tilted to the side as she peered past me and her sister catching a glimpse of my computer screen. "What's that on your computer, Daddy? It looks like fun too. Can I watch with you guys?" 'Where's your Mum?" "She's gone shopping. I didn't want to go so she left me here with you guys." "Oh well," I thought, "in for a penny in for a pound, as they say." "OK, but this has to be a secret between us and no one must know. Lock the door and come over here with us." Just the thought of fucking Kim and I was ready to cum. She almost ran over to my desk and stood beside me and her sister, both of us naked and still fucking as we talked to her. She either didn't care or didn't notice as she stared at the screen in front of her. The previous scene finished and a new one with twin girls around my daughters' ages are on screen in lingerie, both had the same designer panties, bra and stockings with the obligatory garter belt, one in red and the other in white. Both were just starting to become young ladies with their breasts forming nicely. Swelling from their pale chests, they looked ravishing as they modelled in front of the camera. Their blonde hair reached just past their shoulders and waved from side to side as they danced to the music playing in the background. Their slender hips swayed in time with the music. The girl on the right then spoke to someone off camera in an English accent. "Are you going to join us, Daddy? We want to have some fun with you." "Yes, Baby, Daddy's going to join you in a minute. Let me set up the tripod and fix the camera in position." The reply came from off-screen. The next shot came with the girls lying on a bed kissing each other with their little hands roaming each other body. Cupping each others' breasts and pinching their nipples through the fabric of their bras. I looked over at Kim next to me and she had stripped off her clothes and was shoving her finger as deep into her wet pussy as a ten-year-old could. She looked up at me and smiled and then offered me her finger to suck on. I willingly accepted it as I lapped up the juices that coated her finger. After I had finished cleaning her fingers she reached up and kissed me on the lips, slowly slipping her tongue between my lips and playing with my tongue in an erotic ballet in my mouth. Lucy broke in between us and kissed her sister with the same passion and intensity as I had just shared with her. I reached down and slid my hand along my younger daughter's body until I reached the zenith of her womanhood and slowly pushed in to her body. Her pussy was slick with her womanly fluids and I eased my index finger into her as she opened her legs to give me better access to her body. My finger slid further and further into her, I waited to hit her maidenhead but my wait was in vain as it was gone. At first I was pleased but then I started to wondered who and how? I pulled Lucy from my cock with an audible pop as she came free of my rock hard cock. As it came into view Kim just grabbed at it and wrapped her tiny fingers around the slimy shaft wet with her sister's juices. "Let's get comfortable." I rose and went to the rug in front of the fireplace, all the time Kim had me by the cock and was not intending to let go. I made myself comfortable as I lay on my back on the rug with Kim and Lucy on each side. I kissed them both in turn as Kim, still holding my cock, sat up for a closer inspection. Her little hand was slowly pumping up and down my shaft still greased with Lucy's juices. Lucy leaned over and offered me her breast to suckle. I joyfully accepted the invite and slowly licked around her hardened nipple before taking the delightful morsel into my hungry mouth. Suddenly I felt a wet warmth on the head of my cock and looked around Lucy to see Kim sucking the end of my cock into her mouth. I fell back on the floor and looked at Lucy. "Have a look at your sister." She turned and saw Kim shoving as much of my cock into her tiny mouth as she could. Lucy gave out a small chuckle and then turned back to me. "She is a natural little cock sucker, Daddy," and she laughed out loud. "How about doing her a favor and eating her out, Daddy?" 'OK, let's do it." Lucy got up and came around and helped me lift Kim onto my body, placing her bald pussy on my chest. Lucy replaced her sister sucking on my cock as I pulled Kim onto my mouth and slowly licked along her pink lips. They were wet with her juices and smooth as silk. Kim then sat upright forcing her bald pussy onto my mouth. I plunged my tongue into her as deep as I could go and licked her inner womanhood slowly increasing the pressure. I reached up with my hands and opened her to me as I spied her clit. It was engorged with blood and extended from its sheath. I teased the end with the tip of my tongue. Each time I made contact Kim would jump. I gathered speed and pressure as I teased and licked her clit and slowly Kim started to move her hips to meet my tongue. Then she started to moan and thrash about as she screamed out. "OH FUCK ME, DADDY! FUCK MY CLIT WITH YOUR TONGUE. OH, FUCK! YEAH! FUCK YOUR SLUT DAUGHTER!" Wow where did she learn that from I thought to myself. Not that I was too worried at this point of time. "OH, FUCK! OH, FUCK!' She panted over and over. "DEEPER. DADDY! LICK ME DEEPER!" "OH, YEAH! JUST THERE, DADDY! LICK IT! LICK IT HARD AND MAKE ME CUMMMMM!" She screamed as her body went stiff and slammed herself down hard on my mouth and tongue. This lasted for a while and then her juices started to flow all over my face and down the back of my throat. Fuck! My Kim's love juices we everywhere and I was in heaven as she was in ecstasy as she came and came hard. Shit! I have never seen anyone girl or grown women cum so hard. Slowly Kim slid from my face onto the floor next to me and Lucy made her way up my body like a snake slithering, all the while licking her sister's juices from me. She licked my nipples and then my chin. Her tiny wet tongue snaked it way around my slips and then she kissed me. Her intensity and passion rose as she pecked my lips once or twice and then wham her tongue plunged into my mouth. We kissed for several minutes as Kim lay on the floor next to us recovering from her orgasm. As we kissed Lucy reached down and grabbed my cock and slowly pumped it up and down up and down the long hard shaft. Her tiny hand barely wrapping around it. "Daddy, will you fuck me?" Kim said in a tiny voice from beside me. She was sitting up on her knees with a sly smile on her face. "I want your hard cock inside of me. Please, Daddy, I really need it!" "OK, Baby, but let's take it slow OK? I don't want to hurt you." "It's OK, Daddy. I want it hard. I've already lost my cherry and my pussy has been stretched for you." She got up and swung her slender leg over me. She now stood over me her bald pussy red and swollen after my oral attack a few minutes ago. A leg either side of me. "What? What have you been up to you little slut?" I said playfully as I reached out and took her hands in mine. "Later, Daddy. Later. First fuck me. Fuck me real good. OK?' She replied, as she lowered herself on to me. "OK, Baby. Come to papa." Lucy jumped up to help her sister and she grabbed my cock in one hand and aimed it at her sister's glistening pussy. With her other hand she helped steady Kim as she lowered herself onto my rock hard cock. Inch by inch she came closer. It seemed to take an eternity. Kim had her head lowered as she looked between her legs as the head of my cock came closer to her pussy. She looked up as contact was made with a shit-eating grin on her face and then looked back down as Lucy slid the head into the entrance of her slick pussy. Her lips parted as the head of my cock started its journey into my daughter's womb. Slowly Kim sank down on my cock. "Fuck! She is tight." I thought to myself. Kim was halfway on when she let herself fall forward resting her hands on my chest. She stayed very still for about 30 seconds as her body acclimatised itself to the invading force of her father's cock. With her head bowed in concentration she pushed down slowly as my cock inched further into her tiny body. "Careful, Baby, you may not be able to take it all." "I want it all." She grunted and kept pushing. After what seem like hours she achieved what I thought impossible and had my whole cock as rock hard and engorged as it was embedded in her little girl pussy. I could hear my little girl panting as she now rested her head on my chest and reached around and clung to my body with her slender arms. Finally she raised her head and smiled at me. "Now I want to fuck. Fuck my cunt, Daddy! Fuck your cock into my little girl cunt as hard as you can and make me cum! I want to feel your cum inside of me!" "What the fuck?" I thought to myself. "Where did she learn all of this" I was determined to find out but not right now I had another job to complete. Fucking my daughter and making her cum, cum real hard. I grabbed my baby girl by the hips and slowly withdrew my cock from her body. It glided out of her like a knife from its sheath and then slowly pushed back into her. I could feel Kim push back down to meet me. I pushed in as deep as I could and held myself there to accentuate the forceful contact with her body. Kimmy responded with the low guttural groan. Slowly we picked up the pace. I was so hot with the sensation of Kimmy's tight pussy snugly clamping around the shaft of my cock. My cock time and time again slid along her velvet-lined tunnel in and out, in and out as we stared into each other eyes. All the time Kimmy moaned and groaned with each thrust. "OH, YEAH, DADDY! FUCK ME GOOD! FUCK ME REEEEEAAAALLL GOOOODDD!" She moaned as she closed her eyes and flung her head back as an orgasm built deep from within her tiny body looking for a way to explode. "That's it, Baby! Take it all from Daddy! Let him hear you cum, Baby girl!' "I am, Daddy! I am! I am taking it all from you, Daddy! I can feel you all the way in my tummy! Fuck me harder, Daddy! Fuck me harder! OH GOD! I THINK I'M GOING TO CUMMMMM!" Her voice transitioned from a whisper, barely audible, to a scream. 'OH, YEAAAHHH! HERE IT IS, DADDDDYYY! I'M CUMMMMINNNNGG!" She wailed as her body thrashed side to side and she slammed her pussy down hard on my rock hard cock embedding it as far into her as she could force it. Suddenly she arched her back and fell silent as her orgasm rocketed through her. My cock felt the rhythmic contraction of her cuntal muscles clamping down and releasing. This was enough for me to cum as my sperm spewed into her body. Spurt after spurt thundered against the walls of her womb. "OH, FUCK! I CAN FEEL YOUR CUM, DADDY! OH, FUCK! HERE I GO AGAIN!" She screamed as a second wave hit her just as she started to relax from her first orgasm. This one hit her harder than the first as her whole body shook. Finally I was spent, every drop of cum had left my body and made it way into my daughter. I was left panting, covered in sweat, on the floor, my daughter now collapsed on my chest struggling to catch her breath. "Oh, fuck! Oh, fuck! That was great!" She panted, her hot breath hitting my chest. I wrapped my arms around her and held her close. After we had recovered I just had to find out. "Where did you learn about fucking? And what about all that dirty talk whilst we made love. Where did you learn all that?" "It's a long story." She replied with a smile. "We have all day, Baby girl, so spill it." "OK. OK. Let's make ourselves comfortable." We made ourselves comfortable on the sofa and Kimmy started her story. "Well, it all started...." She began.