Becoming Daddy's Good Girl
Chapter 9: Bratty Sister Transformed

Copyright© 2016 by mypenname3000

Incest Sex Story: Chapter 9: Bratty Sister Transformed - A teenage girl wants to be obedient to her father.

Caution: This Incest Sex Story contains strong sexual content, including Ma/ft   ft/ft   Fa/ft   Mult   Teenagers   Consensual   Lesbian   BiSexual   Heterosexual   Incest   Mother   Sister   Father   Daughter   BDSM   DomSub   MaleDom   Spanking   Light Bond   Sadistic   Gang Bang   Interracial   Black Male   White Female   Oriental Female   First   Oral Sex   Anal Sex   Masturbation   Sex Toys   Exhibitionism   Voyeurism   Small Breasts   Public Sex  

Alice trembled before me while Daddy’s commands echoed through the hall: “Get in here and get across my lap. You need discipline, too, young Lady.”

Such powerful words. I lifted my face from between Alice’s butt-cheeks, the sour flavor of her ass lingering on my lips. My sister and I had just gotten home from spending the day with my friend Sun at the park. It was my task, given to me by Daddy, to get Alice so horny and excited she would be ready for the next phase in Daddy’s plan to transform Alice from my bratty sister into a good girl.

Like me and Mommy.

At the park, Sun helped out in with my task. She fucked a strange man in the open while Alice and I fingered each other’s cunts. It was so hot watching the strange man fuck my friend’s underage cunt while my fraternal twin sister fingered my pussy. All three of us came hard, though Sun exploded the loudest on the muscular hunk’s huge cock. Then Alice and I returned home and “caught” Daddy spanking Mommy for some made-up reason.

Alice, completely horny, was entranced by the sight. She wanted what Mommy was getting, a naked spanking on Daddy’s lap. My sister misbehaved so she would be spanked by Daddy. It was her deepest desire and one Daddy planned on harnessing. So while my sister watched, I rimmed her ass and fingered her pussy, getting her more and more wet.

And then Daddy revealed he knew we were there the whole time.

My pussy ached in my panties as I rose. Alice trembled, her shorts and panties bunched around her ankles. Daddy sat on the end of his bed, staring at Alice as Mommy slid naked off his lap. Daddy’s cock thrust hard up before him, so thick and huge.

“Well, Alice,” he snarled. “If I have to get up and march over there, you will regret it.”

“Sorry, Dad,” squeaked Alice. She rushed forward, stepping out of her shorts and panties, leaving them behind. She always made messes, but this time I forgave her.

I followed after, my body trembling with excitement as I peeled off my top and dropped it on the halfway floor. Why not? Alice already made the mess. Then I wiggled out of my skirt and panties. Alice reached the bedroom, glancing at our mother kneeling naked before Daddy, her dark hair gathered in a braid that matched my own.

Daddy liked his girls wearing braids. Alice would have to grow out her tawny hair to have a proper braid.

“I ... I’m sorry, Daddy,” Alice said, swallowing. “But ... but ... you want me to stretch across your lap ... with your ... your...”

“Cock?” Mommy finished in her sweet voice. Her breasts jiggled as she looked up at Alice. “Isn’t that what you want? To feel his hard dick against your stomach as you squirm on his lap and enjoy every single one of his spankings.”

“Mom?” gasped Alice. She threw a look over her shoulder and blinked as I entered the room naked. “Melody? What is going—”

She squeaked as Daddy ripped off her shirt, seized her arm, and pulled her across his lap. His cock pressed into her stomach. Her fourteen-year-old body squirmed on Daddy’s lap, her ass jiggling. Juices glistened between her thighs.

I couldn’t resist and brought my fingers to my mouth, savoring my sister’s sweet musk staining my digits. Mommy flashed me a naughty smile, her gold choker glinting about her throat. I also wore a choker, mine adorned with a unicorn charm which read “Melody, Daddy’s Good Girl.” Mommy’s had a heart-shaped locket which had “My husband’s loving, submissive slave” inscribed on the inside next to a picture of them kissing during their wedding.

“What is going on?” Alice demanded as she squirmed. “Why is everyone naked?”

“I thought you were a bright girl,” Mommy said. “Isn’t it obvious?”

“We’re Daddy’s good girls,” I beamed. “Mommy and I are Daddy’s sex slaves.”

Alice goggled. “What?”

“When I came into your room yesterday, it was because Daddy told me to,” I beamed. “I massaged your ass and then your pussy and made you cum so hard because I am a good girl.”

“And I was sucking your father’s cock just outside your bedroom, listening to you two girls squeal.” Mommy smiled. “The sounds you two made, Alice.”

My sister’s cheeks went red. “I ... I...”

“You have a choice, Alice,” Daddy said, his hand stroking her ass. He gave her cheek a firm squeeze, bringing a shudder. “You can keep being a defiant, rebellious brat, always defying your mother and causing problems, or you can be a good girl for Daddy. You will behave. You will follow instructions. And you will receive what you crave.”

“And what’s that, Daddy?”

“To be disciplined.” He raised his hand up and brought it down hard on her butt-cheek. The stinging smack echoed through the room. My sister gasped and bucked, squirming on his hard dick.

“Being disciplined is my reward?” Alice asked.

“For you,” Daddy said. “I know how much you love it. You are always a brat to your mother just so I will punish you.”

Alice lowered her head. “Sorry, Daddy. I just ... I just love it. I know it’s fu ... messed up and wrong to want this.”

“Oh, no, honey,” Mommy said. She leaned out and cupped Alice’s face. She lifted my sister up to look her in the eyes. “There is nothing wrong with those desires. All girls want their Daddies to love them. You just have a kinky way of expressing it.”

Daddy cracked his hand down again on her ass. Alice gasped, her face contorting with pain while a wanton moan escaped her lips.

“If you want the spankings to continue, you have to commit yourself to being my good girl.” Daddy squeezed her reddened ass. “If not ... well, there are other ways to punish you.”

“Like?”

“Taking away your phone. Grounding you to your room. No internet. No spankings.”

“And if I ... become your good girl?”

I trembled, staring at my sister’s face cupped in Mommy’s hands. I wanted Alice to say yes so badly, but I could see the fear in her eyes. She glanced at me. I gave her a smile and nodded my head, my nipples so hard, my pussy so wet. I wanted to masturbate.

But I didn’t have Daddy’s permission.

“Then you will serve me like your mother and sister,” Daddy said. “You will obey me and stop being a brat to you mother. She deserves your respect. And you will service me with your body, submitting to me, just like you crave.”

“We’ll ... have sex?” Her voice was so tiny, so girlish.

“Yes. I will fuck your cunt, your ass, your mouth. I will own every hole on your body. I will use you, cum in you, and give you such pleasures that you’ll scream for more.” He smacked his hand down on her ass. “I will give you what you crave. I will make you into my slut. My slave. I will mold you like I did your sister.”

“Say yes, baby girl,” Mommy said, leaning closer. “Trust me, you will find such joy in submission. Far more satisfaction than your petty rebellion. Love your daddy. Be his good girl.”

“Please, Alice,” I nodded. “You will truly love it.”

Alice bit her lip then she nodded her head.

“Say it,” growled Daddy.

“I...” She swallowed and took a deep breath, her red ass wiggling. “I want to be Daddy’s good girl.”

Daddy groaned in delight. He smacked his hand down hard on Alice’s ass. My sister bucked and moaned as Mommy leaned in and kissed her on the lips. I smiled, loving the sight of Mommy kissing my sister, her daughter. It was so wicked and taboo. Alice squeezed her eyes shut, lips working as she kissed Mommy.

Crack!

Daddy’s hand smacked down on her ass again. Then he pulled my sister closer to his stomach. The tip of his dick popped out from her side, throbbing hard and purple as he drew back his hand and smacked it down on her ass.

“Slut,” Daddy growled, staring at me, “suck my dick while I spank your sister’s ass red.”

“Yes, Daddy,” I moaned in delight, my pussy clenching between my thighs.

Mommy broke the kiss and Alice glanced at me, eyes wide as I crawled towards them. Daddy cracked his hand down. Alice bucked and moaned in bliss, her body shifting, Daddy’s cock sliding along her skin. A big drop of precum beaded at the tip.

I licked it up. Daddy groaned.

“Yes, yes, suck Daddy’s cock, Melody,” Alice said, her eyes wide as my cheeks hollowed about Daddy’s cock. “Holy shit, he took your cherry. That’s why you changed while I was gone. Holy shit.”

Crack!

“He did,” I grinned as she moaned and bucked again.

I sucked the tip of Daddy’s cock into my lips. I could only engulf the crown. My lips pressed into Alice’s side. I swirled my tongue, caressing his cock, gathering more and more precum as I sucked. I wanted to bob, to take more of his dick, but that was impossible.

So I enjoyed what I had, grateful my sister was so skinny.

Daddy grunted and groaned, his face twisting with pleasure as he cracked his hand down on Alice’s ass again and again. The sounds echoed through the room. Alice’s screams grew louder, her face turning red, tears falling down her cheeks.

But her moans were full of passion. She loved the pain. She loved the pleasure.

“And remember,” Mommy purred to Alice as I sucked hard on Daddy’s cock, “good girls only cum with their Daddy’s permission.”

“What?” gasped Alice.

“You heard your mother, slut,” Daddy growled and smacked his hand down on Alice’s ass.

“But I’m getting all juicy,” she moaned, a whining catch to her voice. “My pussy’s so hot. I need to cum, Daddy.”

“I know what you need, slut,” he growled and smacked his hand down on my sister’s ass. “If you want to be my good girl, you have to trust that I’ll give it to you. That I won’t harm you but will provide what you long for.”

“Y-yes, Daddy.”

“Ask permission, sweetie,” Mommy purred, always so loving and supportive.

I know I wanted to cum. My pussy was on fire, but my mouth was too busy sucking Daddy’s cock to ask. My juices dripped out of my snatch. I pressed my thighs together, squirming as the excitement tingled my cunt. It was like little ants crawling over my pussy, each one exciting me more and more. I so wanted to cum. To thrust my fingers between my thighs and frig myself to the world’s largest orgasm.

But I didn’t. I fought my urges and pleasured my daddy.

“Please, Daddy, may I—”

Crack! Alice’s words became a moan of pain and pleasure.

“May I cum, Daddy?”

Crack!

“No.”

Crack!

“B-but I’m so excited. I’m so close ... Please, Daddy. My pussy is so wet. Melody licked my ass and rubbed my cunt while I watched you discipline Mom, and now I’m dripping.”

“I can feel your juices on my thigh,” Daddy growled, “and your clit rubbing against me as you squirm. You will cum when I tell you, slut, and not a minute earlier.”

“It can be so hard to resist,” Mommy purred, “but the pleasure, sweetie, the pleasure is so intense when he finally lets you cum. Fight it. Submit to him. Prove you’re his good girl.”

Crack!

Alice squirmed. “I ... I will, Mommy. I ... I want to be. I want to be spanked and loved and fucked by Daddy. I want it so much. It’s why I’m so wet. So horny. I want to cum so badly.”

Crack!

“But I’ll be good.”

“Yes, you will,” Daddy growled. “My little slut. My daughter-whore.”

Crack!

I sucked so hard on Daddy’s cock. I put all my effort into it, focusing on his dick and not my aching pussy. Out of the corner of my eye, Mommy squirmed beside me, hands on her knees, gripping them, her eyes locked on Alice’s ass, watching her husband spank their daughter.

What a wicked Mommy.

“You!”

Crack!

“Are!”

Crack!

“My!”

Crack!

“Good!”

Crack!

“Girl!”

Crack!

“Yes, yes, yes, Daddy!” Alice moaned, bucking, her voice strained, thick with resisting her climax. She gasped and groaned, coming closer and closer to her orgasm, but fighting it. “I am! I’m your good girl. Please, please, let me cum!”

“No!”

Crack!

“Yes, Daddy!”

Hearing Alice say those words, with all her submissive passion, set Daddy off. He growled as his dick erupted into my mouth. Hot, salty cum. I savored it, swallowing the load, letting it wash through my mouth. More and more squirts flooded me. His balls emptied. His cream slid down my body and warmed my belly.

“Share with your mother,” Daddy groaned as the final blast shot into my mouth. “And your sister.”

I held the last squirt in my mouth as I popped my dick off Daddy’s cock. Then I turned and planted a hot kiss on Mommy’s lips. She sighed into it. I couldn’t resist seizing her large breasts, squeezing and kneading them as we snowballed his cum back and forth between us, our tongues caressing.

Daddy said something, and then Alice slipped off his lap and knelt beside us. She leaned in, rubbing her tear-stained cheeks against mine as her lips joined the kiss. A three-way, messy, sloppy, jizz-filled, incestuous kiss. We passed Daddy’s cum back and forth, Mommy sharing her husband’s seed with her two daughters.

It was so taboo. So forbidden. Daddy stood over us, arms folded, watching us, so strong, so sexy. His cock half-hard, a smile on his lips. All three of his good girls swapped his cum back and forth, moaning, sighing.

Alice’s hands joined mine on Mommy’s breasts. Hers were hesitant. But Mommy moaned her encouragement and I guided her, showing her how to love her large breasts. They were so big and soft. Mine were round and nice, and Alice’s were only tiny mounds. We must have boobs from Daddy’s side of the family.

“Wow,” Alice said, breaking the kiss, her cheeks flushed. Her nipples hard.

“Uh-huh,” I said.

Mommy smiled at Alice. “Mmm, you have such cute titties. And look at these nipples. Sir, doesn’t she have the cutest nipples?”

“Yes, she does, June,” Daddy said. When he called her June, he was at his most loving. He seized Mommy’s braid, holding it like a leash as she leaned down and sucked on Alice’s small, pink nipples.

“Oh, Mom,” Alice groaned, leaning back on her hands.

She had a spare nipple. Grinning, I leaned over and sucked it into my mouth. I nibbled and teased it while Alice gasped and groaned. She squirmed, her thighs spreading as we teased her with our mouths, giving her such naughty delights.

Her nipple felt wonderful in my mouth. So tiny and delicious. I nipped it with my teeth. Daddy watched us, drinking in our incestuous, lesbian threesome. Mommy and I pushed Alice down on her back, attacking her nipples, our hands stroking her body, driving her wild. I found her pussy, hot and wet, dripping and ready for Daddy’s cock.

“Sluts,” Daddy growled. “Enough. None of you have permission to cum. Downstairs, now. It’s time to play.”

“Yes, Sir,” moaned Mommy, her eyes glossy with lust.

“Play?” mouthed Alice.

“In the dungeon,” I grinned.

“Dungeon?”

“The secret room in the basement we’re not allowed in.” I beamed. “I’ve been in there, and it is naughty.”

Daddy had played with Sun and me in that room when she slept over. I lost my anal cherry in there. Oh, that was so hot.

“Come along, sluts,” Mommy purred, “your father and I have waited fourteen years to play with you both.”

Alice’s eyes widened and I winked at her. I would explain later, but Mommy was raised to be her daddy’s sex slave, and then she met our daddy, fell in love, and grandpa sold her as part of the wedding ceremony. When she gave birth to twin girls, she was eager for our daddy to have the same experience.

She was such a wicked Mommy.

The three of us trailed after Daddy. He held Mommy’s braid like a leash, pulling her along while Alice and I walked behind her holding hands. My sister beamed. The stairs were two narrow for us to walk side-by-side. I let her go first.

I wanted to stare at her red ass. Ooh, Daddy spanked her hard.

Alice gasped when we entered the dungeon. The walls were black cork—to muffle sound, though that wasn’t needed any longer since we all were Daddy’s slaves now—and there was a spanking bench, a St. Anthony’s cross, hooks in the ceiling for suspension play, shelfs full of sex toys and BDSM delights, an assortment of paddles, whips, and canes on the walls, a chest full of rope.

“Wow,” Alice said, turning around in the room, her toes digging into the soft, black carpet. “I can’t believe this is in our house.”

I pulled her down so we knelt before Daddy, both of us staring up at him, trembling. He was so handsome, especially with the barbwire tattoos crossing his muscular torso and fire sleeve-tattoos. He stared at us, eyes intense.

“Believe it, dear,” Mommy said, kneeling beside Daddy. “Sir, how do you want your daughters prepared?”

“Nipples and clits clamped,” Daddy ordered. “And butt plugs.”

“Yes, sir,” Mommy said. She rose swiftly and moved to the cabinets.

Alice swallowed but didn’t look away.

Mommy returned swiftly, knowing just where to go, her hands full of supplies. She knelt beside Daddy. “Sir, do you want to apply them or shall I?”

“I think their mother should do it,” Daddy said, his dick thrusting hard before him.

“Yes, Sir,” purred Mommy. I saw the twinkle in her eye—Daddy rewarded her for birthing him two submissive daughters.

She crawled forward, kneeling before us. “Melody first,” she said, “since she’s such a good slut for Daddy.”

“Thank you, Mommy,” I smiled.

Mommy winked at me. I knew why I went first. I had to be an example for Alice. I kept my back straight, my round breasts thrust before me. My nipples were so hard. But that didn’t stop Mommy from leaning over and sucking on my right nipple. I gasped, the pleasure shooting right down to my pussy. I squirmed, my hands behind my back aching to clasp together.

Then Mommy’s lips popped off my nipple and she replaced it with the clamp in a heartbeat. I sucked in a breath at the sharp pain flaring in my nipple. The alligator clamp bit into my nipple. The weight pulled it down. In moments, my nipple throbbed with a painful ache.

Daddy’s eyes smiled as he watched, pleased.

“Wow, Melody,” Alice said, staring at my clamped nipple in awe. “Does that hurt?”

“Uh-huh,” I said, my voice strained by the pain. “But that’s what makes it wonderful.”

“You’re not the only pain-slut in the family, Alice,” Mommy purred before she sucked on my other nipple.

I groaned. The duel sensations of pleasurable nursing and painful clamping shuddered though me. The conflicting inputs from my two nipples made me squirm and moan. I groaned as Mommy sucked so hard on my nipple. It made the other one throb even harder, the pleasure reminding me of the pain.

Then Mommy’s lip popped off and the clamp snapped on. I groaned, shuddering. The pain was exquisite. Agony throbbed along both my nipples while Mommy kissed down my stomach. I rose up on my knees, giving her access to my pussy.

“Mommy,” I moaned as her fingers parted my silt and her lips sucked on my clit. “Oh, Mommy, yes.”

Alice’s eyes were wide with awe as she stared at both my clamped nipples. As my breasts jiggled, the nipple clamps waved, stretching and pulling on my nipples. Pleasure rippled through my body, crashing into the agony. I grit my teeth, the two sensations so wonderful. Her lips so soft, the clamps so hard.

And then true agony shot through me.

I screamed and threw back my head as she clamped my clit. My pussy convulsed. I came so close to cumming as my poor, aching clitoris throbbed in the padded grip of the smaller clamp. Even with the felt padding on the clamp, it hurt so badly.

So wonderfully.

“That’s my good girl,” Daddy growled, watching us submit to him.

“T-thank you, Daddy,” I answered, squirming. Every movement made the clit clamp pull on my nub.

“Mmm, you are such a good girl for Daddy,” Mommy moaned. “You make me so proud.”

“Thank you, Mommy,” I said, tears beading in the corners of my eyes.

I hardly felt her insert the lubed butt-plug. It wasn’t the largest I had taken. I groaned, shuddering and twisting as it settled into my bowels. The intrusion paled compared to the agony throbbing my clit and nipples.

I took deep breaths, controlling the pain and the excitement it generated. I fought against my wet pussy’s desire to be frigged as Mommy moved onto Alice. I looked at my sister, and gave her a tight, encouraging smile. She nodded back, resolved to submit.

 
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