Bbl Obsession
Copyright© 2026 by Kinjite
Chapter 5: Weeks 4-5 - the Shift
Incest Sex Story: Chapter 5: Weeks 4-5 - the Shift - Madison is back. Now 15, three months postpartum, and desperate to fix what pregnancy destroyed. When her father offers another "specialized protocol"—this time for post-baby body sculpting—she researches it first. Googles "lactational amenorrhea." Reads multiple sources. The science is real. She's safe this time. Week 4: Instagram-perfect results. Week 6: two pink lines. A dark comedy about learning nothing from past mistakes.
Caution: This Incest Sex Story contains strong sexual content, including Ma/ft Consensual Heterosexual Fiction Incest Father Daughter Cream Pie Massage Pregnancy AI Generated
The sessions were getting more intense.
Longer. More frequent. Him barely able to control himself.
Madison came downstairs for their afternoon session.
Her dad was already hard—straining against his pants before she’d even taken her clothes off.
“Lunges today,” he said, voice rough.
She got into position. He pushed into her from behind—deep, so deep it made her eyes water.
“Your body was made for this,” he breathed, not clinical at all anymore. “Look how well you take it. Every inch.”
He thrust deeper and Madison gasped, her cervix aching.
“You can take more,” he said, his hand pressing on her lower belly. “You can take everything I give you.”
He was fucking her harder than usual—not the controlled thrusts of the exercises. Urgent. Almost violent.
“Dad, it’s too—”
“You can handle it,” he said, voice rough. “Your body can handle anything.”
His hand pressed harder on her belly as he thrust deeper.
“Feel where it’s going?” he said. “Feel how deep that is?”
Madison whimpered.
He came with a groan that didn’t sound clinical at all—raw and guttural.
His cock pulsed and pulsed, and Madison felt the sheer volume of cum flooding her—more than usual, hotter than usual, like he’d been holding back and finally couldn’t anymore.
“That’s it,” he breathed, still thrusting, still cumming. “Take all of it. Every drop.”
His hand pressed harder on her belly, and Madison gasped at the pressure—the sensation of his cum being forced deeper inside her.
He kept cumming for what felt like forever.
When he finally pulled out, cum poured out of her in a rush.
He watched it leak out, breathing hard, and for a moment his hand moved like he was going to push it back inside—
Then he caught himself.
Cleared his throat.
Stepped back.
“Good session,” he said, voice still rough. “Very productive.”
But Madison noticed: he was still hard.
Still ready.
Like once wasn’t enough anymore.
Madison was bent over the washing machine, pulling Emma’s onesies out of the dryer, when she felt him behind her.
Didn’t hear him. Felt him.
His hand came to her hip.
“How are your glutes feeling today?” her dad asked quietly.
His other hand slid up her thigh, stopping just below her ass.
Squeezed.
“Good progress,” he murmured.
Madison froze.
Her mom was upstairs. Right upstairs.
His hand slid higher, fingers pressing between her legs through her leggings.
“Very responsive,” he said.
Then footsteps above them.
He stepped back immediately, grabbed laundry detergent from the shelf like he’d just been getting supplies.
“Don’t forget your session at four,” he said normally, and walked past her up the stairs.
Madison stood there, heart pounding, his touch still burning on her skin.
“Let me assess your development,” her dad said after.
Madison was still on her hands and knees, his cum leaking out of her.
His hands came to her ass, gripping, squeezing, kneading.
“Good muscle density,” he murmured. “Tissue responsiveness is excellent.”
His hands kept working, thumbs spreading her cheeks.
Quality control on my ass.
Madison felt more cum leak out.
One thumb slid down, pressed against her pussy, pushed the leaking cum back inside.
“Dad, what—”
“Checking absorption,” he said. His thumb pushed deeper. “The bioactive compounds need adequate contact time with the tissue. They’re absorbed through the vaginal walls and distributed to the gluteal region. You’re retaining well.”
Oh cool.
His cum travels through my pussy to my ass.
That’s how it works.
Employee of the month: best cum absorption.
Week 4 Measurements:{br}
Waist: 26.75”
Hips: 40.5”
Glutes: 42”
Wait.
Her waist went UP.
She measured again. Same result.
She went downstairs. “My waist increased.”
Her dad studied the notebook. “Muscle glycogen storage. When you’re building muscle aggressively, your body stores extra glycogen in the tissue—that binds to water at a 1:3 ratio. Creates temporary circumference increases. It’ll stabilize once your body adapts to the training volume.”
Glycogen. Water weight. Training adaptation.
That made sense.
... Right?
She’d been eating more—he’d told her she needed extra calories for muscle synthesis.
That was probably it.
Just temporary bloating.
Definitely bloating. Not anything else. Just bloating.
She posted another progress photo anyway.
“4 weeks postpartum 🍑✨ The journey continues! #PostBabyGlow #Transformation”
“you’re literally GLOWING”
“okay I NEED to know what you’re doing”
“this progress is actually insane”
“YOU LOOK INCREDIBLE”
Madison smiled at the comments.
See? I’m glowing. People keep saying it.
That means I’m healthy. That the workouts are working.
... Right?
Madison woke up feeling weird.
Not sick exactly. Just ... off.
She went to the bathroom, looked at herself in the mirror.
Her breasts looked fuller. More tender than just breastfeeding would make them.
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