Chapter Text
Pirate Hunter Roronoa Zoro was massively pregnant with twins. He would love to blame the ero-cook for his predicament, but it took two to tango, and the angry-hate sex was always amazing. Still, he had the urge to chop off the cook’s dick when he had to waddle to the toilet for the hundredth time that day, the weight of the babies pressing insistently against his bladder.
Male omegas almost never get pregnant outside of their heat, but of course he and the cook would defy the odds and even filled his womb with two babies.
‘Two healthy, very big, very heavy babies.’ Zoro grumbled, one hand on his aching back, the other massaging his stretched skin.
In the beginning, what Zoro and Sanji had going was casual, no strings attached thing to release excess energy after a fight, or whenever things were slow and boring. Sanji still fluttered around Nami and any pretty ladies he laid his eye on, so Zoro did not expect Sanji to be happy about him, a male omega, getting pregnant from their dalliance.
But the cook was not unhappy at the news.
“P-pregnant?” Sanji looked at Zoro, wide-eyed and uncomprehending. It had been around two months since Sanji joined the crew, and even less than that since the two started their occasional fumble in the dark.
“I felt off, so I looked for a doctor,” Zoro gestured at the island where Merry is currently docked at.
“Twins, four weeks.” Zoro crossed his arms in front of him, looking to the side, fully expecting the cook to get angry and hurl insults at the freak omega who managed to get himself pregnant out of his heat.
“I know you didn’t ask for this, not when I didn’t even have my heat. It was a one in a million chance, a-a freak accident because I’m a freak o-“ Zoro clamped his mouth shut, rubbing harshly at his face.
“So, uh, just letting you know I don’t expect anything from you.” Zoro turned to walk away; he did not feel like hearing the rejection that was about to come out of the cook’s mouth. He did not care, at all. He blamed the tightness in his throat on the hormones.
Arms shot out to hug Zoro from behind, halting his steps. He could feel Sanji’s body plastered to his back, forehead resting at the back of his neck.
“Twins?” Asked a shaky voice.
“Yes.” Zoro’s breath hitched. What was the cook doing? Why was he hugging Zoro? If Sanji did all this just to push him away…
“Four weeks?”
“Doc said so.”
Sanji let out a wet laugh and turned the swordsman towards him.
“Four weeks, that’s only one to two weeks since we started having sex.” Zoro shrugged, still not meeting Sanji’s eye.
“Hey, look at me.” Sanji gently nudged Zoro’s face to look at him. He was greeted by the cook’s awed face, eye shining with tears.
“That was amazing. ”
“Uh, what?” Zoro croaked, not sure what was happening, not daring to hope.
“Barely two weeks and you got pregnant. That’s amazing, Zoro!”
Zoro had never seen the cook smile so wide, much less directed at him.
“You… you want us?” was it possible, after all?
Sanji laughed, loud and happy. “YES! I want you, all three of you. And us two, together.”
“Oh.” Zoro felt tears forming in his eyes. He did not even realize that he wanted things to work out with the cook so badly. Or that he wanted these new lives in him to have loving parents and family that he himself never had.
“C’mere, mosshead.” Sanji embraced him, pushing Zoro’s face into the crook of Sanji’s neck.
“This is unexpected. It was an accident, but not an unhappy one. And, Zoro.” Sanji’s arms tightened over the swordsman. “You are Not. A. freak. Okay?” He kissed the side of Zoro’s head with each word.
“Okay.” The tears came harder. They both stood there for however long it took for their tears to stop, and longer after.
---
From the moment he realized he was pregnant, Zoro did everything it took to make sure his babies would grow strong and healthy. Not drinking made him grumpy, but the health of his babies come first. Whenever he itched with the urge to drink, he picked a fight with the cook. Of course, the fights would always end with either Sanji’s cock or fingers in his hole.
Usopp and Nami had to teach Luffy not to bother the happy couple whenever they were ‘fighting’, but it was Sanji’s threat of not feeding him any meat that successfully kept him away.
Luffy and the crew searched, bought and stole at whatever ports and settlements for baby supplies, vitamins, medicines, anything they thought would be useful for their pregnant swordsman. There were no doctors on board, much less one well-versed in pregnancy, so they hoarded whatever baby related items they laid their eyes on, filling the store room to bursting.
Zoro had been presented with multiple bottles of pre-natal vitamins by the excited crew. They all looked the same and yet so different to him, so he picked one bottle at random. After scrutinizing its label and its intended purpose, he downed several pills.
“Uh, should you be eating that many at once, Zoro?” Usopp asked nervously.
“These are vitamins, right? A little more won’t hurt, surely.” Zoro frowned.
“Shishishi, and you gotta eat lots of meat, Zoro! So the babies can grow faster and stronger!” Luffy grinned, smile never leaving his face after learning he was going to get two more nakama.
“Once again, that’s not how it works, Luffy.” Usopp sighed.
---
With the news of the swordsman being pregnant, ‘With twins! ’ Sanji thought happily, excitedly. He scoured the islands they stopped by for baby books and recipe books, looking for the best, nutritious meals for his omega and babies. He woke up before dawn to whip up delicious feasts, to the delight of Luffy. He admitted, he might have gone slightly overboard sometimes.
‘But who cares, I’m going to be a dad!’ He ran to the galley door and wrenched it open. “Guys, I’m going to be a dad!”
“Shishisi! You are! And you’re gonna be the best dad, and I’m gonna be their best friend!” Luffy shouted from his usual spot, whooping.
“Yes, yes, Sanji-kun. Congrats.” Nami looked up from the map she was looking at with a small smile.
“Congratulations, Sanji.” Said Usopp. “You told us that three times today already. And twenty times yesterday. And the day before.” Usopp grumbled, but he could not stop smiling at seeing his nakama so happy.
“Shut up, shit cook!” Zoro groused from the crow’s nest.
“Ah, were you napping, Mosshead? Sorry, I’ll keep it down. Go back to your nap~.” Sanji twirled back into the kitchen.
“Oi Zoro, you’re on watch, don’t sleep!”
“Whatever,” Zoro mumbled, going straight back to his nap.
Bountiful, nutritious meals, plenty of naps, and multiple bottles of pre-natal vitamins. As a result, his babies grew bigger and stronger, and his womb continued to swell and stretch around his twins, bigger than Zoro thought to be possible.
---
At 28 weeks, Zoro looked like he was overdue even though the babies still had more than ten weeks of growing to do. Walking became too much of a chore; the weight and size of his babies were pressing against his organs and grinding down against his pelvis.
To Sanji’s delight, he decided to spend more time resting his swollen, aching ankles. That meant spending most of the day in the galley, with easy access to food and bathroom. During downtime between meal preparations, Sanji also generously helped putting his swollen feet up in the air, cock gently entering his soaking wet hole.
“Beautiful, Zoro. You look so good, all swollen with my babies and stuffed full with cock,” Sanji is slowly feeding his thick cock into him, eyes locked onto where Zoro’s plump ass is desperately stretching against the massive rod.
“So good,” Sanji pushed in slowly, enjoying the wet tightness.
“What a slut,” he slid another slow inch by inch, pulling helpless whimpers from the swordsman.
“Always so wet for me.” Sanji was awed at the amount of slick was currently leaking out of Zoro. The hormones caused the swordsman’s libido to be on a hair trigger. The cook could simply look at him a second too long, and the delicious smell of omega slick would reach his nose.
“Pinned down with our babies, and still begging for more.” Zoro’s soaked hole was twitching around the intrusion, obscene squelching accompanied every shift of the blonde’s cock. The swordsman was holding onto Sanji’s shoulder, eyes rolled back in bliss.
“Yes! Yes, please, more! Haa, so big!” Zoro sobbed. Sanji has been teasing him for some time now, pulling out until only the head of his cock is inside, playing with the rim of his hole, just to drive in sharply, ramming at his prostate.
“Sanji!” Zoro cried out, “More, deeper!” a harsh thrust and the cock touched his sensitive cervix. Zoro thrashed and whined, pulling the cook closer with his legs.
Sanji could do nothing but obey the whims of his omega. He secured Zoro’s legs around his waist and used his powerful legs to slam inside, battering at the pliant, slick hole.
“AH! Ahh, ah, Cook! ” Zoro held his belly, feeling like his whole body would be sent flying by the force of the cook’s thrust. He could do nothing but accept the pounding of his poor insides.
“SANJI! ” Zoro shrieked, coming untouched when Sanji’s cock delivered several sharp jabs at his cervix. His body arched around his massive mound, hole clenching around the aggressively moving cock inside.
Sanji’s thrusts did not slow when the omega came, enjoying the vice grip around his cock. He could feel his knot slowly enlarging, pulling at the omega’s rim every time he pulled out, only to force the whole thing inside roughly over and over again.
“S-Sanji, I- unh, sto- “ Zoro was sensitive after his orgasm, but the alpha kept shoving his swelling knot inside, spreading him wide open with every pass of the cook’s knot over his rim. Sanji’s cockhead kept kissing his cervix, trying to nudge its way inside the already-filled womb, causing Zoro’s toes to curl from the torturous mix of pain and pleasure.
“If only, haa, you could see yourself, Zoro. So hot, so lewd, all for me.” As his knot was getting bigger, Sanji’s eye was transfixed at how the rim of Zoro’s hole was clutching at him, trying to keep him inside. But he was not done. He pulled out, abusing the pliant, swollen sphincter, only to cruelly drive back inside, forcing the muscle to stretch obscenely around the immensely swelling knot and pulling agonized screams from the swordsman.
“So big, I can’t- a- ah! ” Zoro cried as the knot finally swelled to its full size, stretching him so big, so full, pressing against his sweet spots all at once. On instinct, his body clenched down to massage around the alpha’s knot, pulling it deeper and milking it for all its worth.
“Sanji! ” Zoro arched his back, sobbing as another orgasm was pulled out of him. Hot alpha seeds were flooding his inside, marking him.
“So good, so good, Zoro.” Sanji was petting him, licking at his mating bite. Zoro kept sobbing as the knot kept stimulating his prostate, prolonging his orgasm past oversensitivity.
Suddenly, Sanji bit down on the mating mark, pulling a shriek out of the omega as a shot of pleasure ran through his entire body. Zoro was thrashing under his teeth, eyes rolling to the back of his head before the omega finally passed out.
“You getting knocked up is the best thing that ever happened, my sweet omega.” Sanji cooed not long after, cock growing hard again inside of the passed out omega. He still had an hour before dinner prep, and he wanted to see how many more times he could make Zoro come, awake or not.
---
At 35 weeks, Zoro’s belly continued to balloon out. He never thought a human belly –except his rubber Captain- could be this big, so full of oversized babies, and yet he was still going to get bigger. The babes were now barely moving, too cramped to do anything more than push weakly against the wall of his womb.
On top of his towering belly, his breasts also swelled greatly, preparing to feed three overgrown babies. The third of which is his own insatiable alpha, who insisted on filling his hole with his enormous knot every night while drinking from his breasts.
Sanji’s hands were gently massaging the soft mounds, encouraging more milk out, all the while sucking and licking at his tender nipples, alternating between the two sides.
“S-Sanji. U-unf. Alpha! ” Zoro was in heaven and hell at the same time. He could not move, pinned to the bed by the weight of his enormous belly. He could only lie there and take it. Sanji’s knot is resting deliciously, torturously on his prostate, his sizeable cock churning deep inside of him, pressing against his sensitive cervix.
“A-AH! Sanji!” Zoro grasped desperately at Sanji’s shoulder, toes curling in bliss. Sanji had ground his knot down on Zoro’s prostate, his cock-head pressing insistently against his tightly-shut cervix.
Zoro sobbed and tried to move away, but he was stuck tight on his alpha’s knot and barely able to move from the weight of his huge belly. He clutched at his middle; with two massive babies in his womb and a huge knot in his hole, he did not think it was possible to be this full. Like his whole existence was for his alpha to fill; with babies, with knot.
“T-too much! No, ah! ” His cervix cannot open to accept the cockhead; his womb was already filled with his alpha’s babies, but it did not stop the alpha from trying anyway. Sanji kept rocking his hip into Zoro, uncaringly using the omega’s swollen hole to pleasure his cock.
“Please, please, AHH! ” the cock pushed hard against his cervix and Zoro screamed. A wave of orgasm hit him hard, his untouched cock spurting come between the two. His muscles tightened, involuntarily massaging the alpha’s knot and cock inside him, pulling another orgasm from the cook.
“Fuck! So good. Haa, Zoro!” Sanji panted against Zoro’s chest, hip twitching weakly as his cock was pumping another load of come into the omega. He could feel how hot and wet it was inside, full to bursting with a massive alpha knot and several loads of come. He kissed whatever skin he could reach in appreciation, leaving numerous marks on the abused skin of Zoro’s swollen breasts.
During the lull after his orgasm, a small amount of milk has pooled between Zoro’s chest and the large, gravid belly. Sanji got back to licking them all up, chasing the ones spilling to the sides of Zoro’s chest, trying to get every last drop.
Never waste food. Sanji is overwhelmed, frantically suckling at Zoro’s left nipple, hating that he could not put both nipples in his mouth at the same time. His hip was moving mindlessly, stimulating the omega from the inside. He saw milk starting to trickle from the one he was not currently abusing, and he dove towards it, not wanting a single drop to escape. A slow trickle came out of the one he just left, so he rushed back to it, then back to the right, and again to the left, and so on. There was so much milk! Never waste food. All the while his hands never stop their gentle massage of the soft flesh, encouraging more.
“Shitty alpha! Stop massaging- Haa- They’ll keep coming out if you keep doing that! Uh- A-ahh- Sanji! ” Zoro sobbed, chest heaving. He tried to bat the cook away, but his hands were trembling so badly. When the knot shifted inside him, he could only cling on to his alpha, one hand clutching at his enormous belly, trying to keep his womb from shifting and pressing at his organs to no avail.
With the slightest roll of hip, Sanji’s knot kept nudging at his poor, battered prostate. Zoro’s own cock was leaking a slow but steady dribble, wetting the underside of his belly. Zoro knew Sanji was going to lick all of that after his knot went down, just to push his soft cock back in after, to keep all his seeds inside.
Even so heavily pregnant, Sanji’s alpha instinct kept demanding he fill his omega with his seeds, making sure not a drop escaped, and plugging everything with his cock. He wanted Zoro to always have him inside, always open for him, smelling of him. He wanted everyone to know just whose babies were stretching his omega’s swollen womb to its limits, that he was the alpha who put not one, but two healthy, large babies inside the omega without the help of a heat.
“Uhh, please. A-Alpha, Sanji, please, no more! Aah! ” Zoro did not want his alpha to stop, but he could not take any more of this. His hole fluttered weakly around the vigorously swollen knot, helpless but to take every grind, every roll of his alpha’s hip.
“Sanji, too much. I- I can’t.” Zoro’s cock was spent, barely producing anything anymore, though it was still half-hard and twitching from the constant stimulation. He tried to relax his muscle, to stop milking his alpha’s knot so it would deflate and let him rest.
“Shh, it’s okay, omega. Shh, I know, I’m sorry.” Sanji finally detached from his chest to coo at him.
“Last one, okay? Last, oh.” A forceful, sharp thrust deep inside, pulling a keen from Zoro.
“I’m sorry, just a little, haah.” Sanji ground down frantically, as much as he could given the knot stuck inside the omega. He desperately gnawed at the side of Zoro’s neck, where his mating bite laid over the omega’s bonding gland.
“A-ALPHA! ” Zoro keened, back arched, overstimulated from all the movements inside him and at his sensitive gland. He thrashed, nails digging into Sanji’s shoulder, incoherent from all the pleasure, pain, pleasure.
“Zoro!” Sanji fucked desperately with his knot, hands squeezing the abused flesh of Zoro’s breasts ruthlessly.
Zoro wailed, his whole body tensed as he came dry over Sanji’s knot. His muscles were clamping down so hard on the alpha’s knot that Sanji could do nothing but spill his final load inside.
“Zoro, Zoro, ” Sanji rode his orgasm, his cock nearing oversensitivity after coming so many times.
A few minutes later, Sanji would lick all the mess from the passed out omega, whatever he could reach while still stuck inside, before pulling the blankets over them. He slept peacefully, holding his whole world safe and secure in his arms.