Ever since their parents married five years ago, the tension between Steve and Bambi had been electric. Steve, twenty-two, was tall, muscular, and walked around the house like he owned it — especially when their parents weren’t home. Bambi, nineteen, was his stunning stepsister — petite but curvy, with full breasts, a tiny waist, and an ass that begged to be spanked. She knew exactly what she did to him, prancing around in tiny shorts and crop tops, but always playing innocent when he stared.
Tonight was supposed to be safe. Both dads were gone for an overnight fishing trip. Or so they thought.
Steve had Bambi pinned in his bedroom, her sundress already bunched around her waist. He dragged her across his lap and started the OTK spanking she secretly craved.
SMACK! SMACK! SMACK!
Her round ass jiggled with every hard slap, turning a pretty pink.
“Steve! Stop — it hurts!” Bambi squealed, but her pussy was soaking through her panties.
“Bullshit, little sis,” Steve growled, yanking her panties down to her knees. “You’ve been teasing my cock for months. Now you’re going to take your punishment like a good stepsister.”
He spanked harder, alternating cheeks until her ass glowed bright red. Bambi was whimpering and grinding against his thigh.
“Tell me what you are,” he demanded, landing another sharp series of smacks.
“I’m… I’m your dirty little stepsister,” she moaned.
“Louder.”
“I’m your forced incest breeding slut!” Bambi cried as his palm cracked across her sore ass again.
Steve grinned. He shoved two thick fingers into her dripping cunt. “Already soaked. You want your stepbrother to breed you, don’t you? Want me to knock up that tight little pussy?”
Bambi’s voice trembled with shame and lust. “Yes… breed me, Steve. Put a baby in your stepsister.”
He flipped her onto the bed on all fours and slammed his thick eight-inch cock into her in one brutal thrust. Bambi screamed in pleasure as he bottomed out, stretching her walls.
“Fuck, you’re tight,” Steve groaned, spanking her red ass while he started pounding. “This pussy was made for stepbrother cock. Gonna fill you until you’re pregnant with my baby.”
“Yes! Harder, big brother!” Bambi pushed back, meeting every thrust. “Breed your little sister! Knock me up so everyone knows I let my stepbrother fuck me raw!”
The dirty talk drove Steve wild. He gripped her hips and railed her harder, the wet slap of skin filling the room. Neither of them noticed the front door opening downstairs.
Mark, their dad, had come home early — the fishing trip cancelled due to storms. The moment he stepped inside he heard the unmistakable sounds of rough sex coming from upstairs. Heart pounding, he quietly climbed the stairs and stopped outside Steve’s open bedroom door.
What he saw nearly made him cum on the spot.
His stepson was balls-deep in his stepdaughter, spanking her bright red ass while pounding her pussy like an animal.
“Gonna breed you, sis,” Steve grunted. “Gonna pump so much cum into your womb you’ll be swelling with my baby by next month.”
Bambi was lost in it. “Yes, Steve! Breed your stepsister! Fill me up! Make me your pregnant little cum dump!”
Mark’s cock throbbed painfully hard in his jeans. He knew he should stop them. Instead, he stayed hidden, watching every filthy second.
Steve flipped Bambi onto her back, hooked her legs over his shoulders, and drove even deeper. The new angle made her tits bounce with every thrust.
“Talk dirty for me, Bambi. Tell your stepbrother how bad you need his load.”
“I need it so bad,” she sobbed with pleasure. “Cum inside me, big brother. Breed your little sister’s fertile pussy! I want your baby growing in me while Daddy’s away!”
Steve roared and buried himself deep, flooding her womb with the first heavy load of the night. Bambi came hard around him, her pussy milking every drop.
When Steve pulled out, thick white cum immediately leaked from her swollen pussy. He scooped some up and fed it to her.
“Swallow, breeding slut.”
Bambi sucked his fingers clean, eyes glazed with lust.
That was when Mark stepped into the room.
“Having fun, kids?”
Both froze in shock.
“Dad—” Steve started.
Mark closed the door and locked it. His voice was calm but commanding. “I watched the whole thing. You two are committing serious incest under my roof… and now you’re doing some twisted breeding fantasy?” He slowly unbuckled his belt. “Since you started it, you’re going to finish it. Right here. Right now. With me watching every second.”
Bambi whimpered, trying to cover herself. Steve’s cock was still hard and glistening with their combined juices.
Mark sat in the chair by the bed. “Steve, spank her again. Over your knee. Make it hurt. Then breed her properly while I watch.”
Steve pulled his trembling stepsister across his lap again, right in front of their dad. He brought his hand down hard and fast.
SMACK! SMACK! SMACK! SMACK! SMACK!
Bambi’s ass was already sore; these new spanks made her cry out loud.
“Tell Daddy what you are,” Steve ordered, spanking steadily.
“I’m… I’m my stepbrother’s forced breeding whore!” Bambi sobbed. “I let him fuck me raw… I want him to get me pregnant!”
Mark stroked his thick cock openly. “Good girl. Beg him to breed you, princess.”
“Please, Steve,” Bambi begged, voice breaking. “Breed your little stepsister in front of Daddy! Fill my womb with your hot cum and knock me up!”
Steve shoved her onto the bed on all fours, facing their dad, and slammed back inside her cum-filled pussy. The squelching sound was obscene.
“Fuck, she’s even wetter now,” Steve groaned. “Dad, you should see how my cum is pushing deeper every time I thrust.”
“Describe it,” Mark commanded, stroking faster. “I want every filthy detail while you breed your sister.”
Steve pounded her hard, spanking her red ass between thrusts. “Her pussy is gripping me so tight, Dad. Hot and sloppy from my first load. Every stroke is pushing my cum right against her cervix. She’s going to get pregnant tonight — I can feel it.”
Bambi was moaning shamelessly now. “Yes, Daddy… watch your son breed me… watch him make a baby in your little girl!”
Steve fucked her through another shattering orgasm, then flipped her onto her back so Dad could see her face and bouncing tits clearly.
“Beg louder, sis. Tell us both how much you need stepbrother seed.”
“I need it! Please breed me, Steve! Put a baby in your stepsister’s belly while Daddy watches! I want to carry your incest child!”
Steve lost control. He pinned her down and delivered a second massive load deep inside her, grunting with every powerful spurt. Bambi’s belly fluttered visibly as he flooded her.
When he pulled out, Mark stood up.
“On your knees, Bambi. Clean your stepbrother’s cock. Swallow everything.”
Bambi dropped eagerly, taking Steve’s cum-covered dick into her mouth. She sucked and licked until it was spotless, then opened her mouth to show Dad she had swallowed every drop.
Mark wasn’t done directing.
He moved them to the master bedroom for more space. For the next several hours he orchestrated every moment of their forced incest breeding session.
He made Steve give Bambi another long, brutal OTK spanking across his lap on the big bed while she recited filthy breeding mantras:
“I’m Daddy’s little girl but my stepbrother’s breeding slut…”
“Fill me with so much cum I get pregnant…”
“Watch us commit incest, Daddy…”
Then Steve fucked her in every position Mark demanded:
- Missionary with her legs pinned back so Dad could see the creampie forming.
- Doggy style while Steve pulled her hair and spanked her.
- Bambi riding Steve reverse cowgirl, facing their dad so he could watch her tits bounce and cum leak out around Steve’s shaft.
Each time Steve came, Mark made Bambi either push the cum out and lick it off the sheets or suck it straight from her stepbrother’s cock. She swallowed load after load like an obedient cum slut.
By the fourth round, Bambi was hoarse and dripping with sweat and cum.
“More… please… breed me again, big brother,” she begged. “I want Daddy to see me get knocked up tonight.”
Steve, exhausted but driven by the taboo, gave her one final deep breeding. He collapsed on top of her as he pumped the last heavy load into her overflowing womb.
Mark finally jerked himself off, shooting thick ropes across both of their bodies.
“Clean each other up with your tongues,” he ordered.
Bambi and Steve licked Mark’s cum off one another, sharing sloppy, cum-filled kisses while their dad watched with satisfaction.
As they lay tangled together afterward, Mark spoke with quiet authority.
“This is our new family secret. You two will keep breeding whenever I tell you to. And next time… I might step in and help fill my little girl myself.”
Bambi whimpered softly, her hand drifting down to feel the warm cum still leaking from her well-bred pussy.
Steve kissed her forehead. “Yes, Dad.”
The forced step-sibling breeding had only just begun under Daddy’s watchful eye.
End.
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