Mpreg Birth Notes #378
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The Head Keeps Slipping Back
He was on his knees on the bamboo mat, thighs trembling, ass pushed back as far as it would go. His huge belly hung low and tight between his spread legs, contracting in long, heavy waves. Every contraction made the buttbaby’s head move forward through the massively prolapsed tissue — but the moment the wave eased, the head would slip back a little, the swollen, everted rectal lining clinging to it like it didn’t want to let go.
The prolapse was enormous. Thick, dark red, shiny and swollen, completely turned inside out around the dark-haired head that kept trying to crown. With every push the head would advance further, stretching the already ruined hole wider, but as soon as he stopped bearing down it would recede again, the puffy mucosal ring pulsing and twitching around the widest part of the skull.
After one particularly strong contraction he gasped and shook his head, voice breaking.
“Fuck— it’s burning so bad. It hurts… I can feel it stretching too much. I’m scared to push harder. What if it tears?”
His partner’s hand stayed steady on his lower back, fingers spread wide, thumb moving in slow, grounding circles over the sweaty skin. But the sight in front of him made his cock throb painfully hard inside his pants.
The prolapse was stretched so thin around the baby’s head it looked almost translucent in places — shiny, strained, the dark wet hair of the buttbaby clearly visible where it was trying to emerge. The swollen tissue clung desperately to the skull, pulled so tight it seemed like it could split open at any second. The contrast between the thick, puffy prolapse and the way it was being forced to open even wider around the head was obscene. His partner stared, breathing heavier, cock twitching hard at the dangerous, stretched-out sight.
For a few long seconds he didn’t say anything. He just watched the head sit there, partially crowned, the prolapse looking like it was seconds from ripping around it. The visual made his stomach tighten with a hot, twisted rush of arousal.
Then the worry cut through.
“Shit… yeah. It really does look like it’s about to tear,” he admitted quietly, voice rough. His hand rubbed gently up and down the man’s back. “Okay, baby. Stop. Don’t push if it hurts that much. We’re not forcing anything. Just breathe through it. Rest if you need to. I’m right here with you.”
He whimpered, the head still partially out, the prolapse pulsing and twitching around it. His own cock hung heavy and leaking beneath everything, a steady string of precum dripping onto the mat. His balls were tight and full, swinging slightly with every shaky breath.
The next contraction started building slowly in his belly. He felt the pressure rising, the deep ache spreading through his pelvis. His partner stayed close, one hand still on his back, the other resting lightly on his hip now.
“That’s it… I can feel it coming. You don’t have to push hard this time. Just let your body do what it wants. If it’s too much, just breathe through it. I’ve got you.”
The contraction peaked. He couldn’t stop the low, pained moan that escaped him as he bore down instinctively. The head moved forward again — slower this time — stretching the already swollen prolapse even wider. The tissue pulled thin and shiny around the widest part of the skull, the dark hair plastered to the baby’s head clearly visible, framed by the thick, everted rectal mass that looked dangerously close to giving way.
His partner watched, heart hammering, cock rock hard, but he kept his voice calm and steady.
“Just like that… breathe, love. I’m right here. We’ll go as slow as you need.”
The head sat at its absolute widest point yet, the prolapse stretched to the limit around it — shiny, thin, and trembling. He trembled beneath his partner’s hand, panting through the intense burn, too scared to push any harder, caught right in the middle of the contraction with their baby’s head fully crowned and visible between the swollen, prolapsed lips of his ass.
