Title: One Step Forward, Two Steps Back
Pairing: SanUso
Rating: NC-17
Warnings: Boyxboy, mpreg, fail!smut during early pregnancy, hilarity, cursing
Summary: There are still some adjustments to be made.
Note: I was actually never supposed to write smut for the Basil universe, but ironically enough this became the first smut fic I'd written for Sanji and Usopp. Well, the first one with actual full blown sex. Oops.

"Oh, ow! Owowow, Sanji, stop!"

The cook froze in place, looking down at Usopp in confusion and pulling his hips back a bit to dislodge the tip of his length from its position at Usopp's entrance. Usopp was gasping with his face twisted in slight pain, one hand touching his bare stomach where the small but noticeable bump was starting to form. While his sudden change in attitude confused him, since the dark haired man was more than willing to jump Sanji a minute ago, Sanji watched him slow his breathing.

It'd been a little more than a week since they discovered they were going to be parents, Usopp taking time to recuperate from the pulled muscle that lead to the initial hospital visit. All of their free time was spent thinking of how to adapt to Usopp's pregnancy, how their lives were going to change, and most recently the way to break the news to their loved ones. They rarely found the time or energy to get intimate, especially when Usopp started bombarding Sanji with questions as they lay in bed to sleep, so when Usopp wrapped both arms around Sanji's shoulders and pulled him closer to nip at his lips, the blond couldn't argue with him.

But while Sanji was extremely careful about crawling on top of him, or making sure to keep all pressure off Usopp's stomach, Usopp still had to stop him and pause to breathe. "You gonna be alright?" he asked, fingers touching at Usopp's knuckles while Usopp's other hand gripped at his upper arm.

Nodding furiously, Usopp regarded Sanji through half lidded eyes and gulped. "Cramp," he moaned. His legs, both resting at Sanji's sides, were clenching and releasing as he relaxed until the cramp seemed to subside. "Sorry, I don't know what- Ow!"

His hand started rubbing circles over his skin, Sanji looking at his actions with the mixture of worry and excitement. As much as he hated to think of Usopp's pain in a happy way, the fact that Usopp was experiencing it because of his pregnancy was a little endearing. A bit of a nuisance since he wanted to have sex with Usopp when he wasn't cramping, but he supposed it would be a small price to pay.

Finally, Usopp relaxed enough to look up at Sanji with a bit of a flushed smile. "Sorry," he whispered. His arms circled Sanji's shoulders again.

"It's alright," Sanji said, leaning down to kiss Usopp's lips as he shifted to align their bodies again.

Things went a bit smoother as Sanji entered Usopp's body and fully slid in, Usopp's gasp different from the pained panic he experienced earlier. But when Sanji pulled back a bit, Usopp suddenly groaned and started pushing Sanji away again. There were tears springing up in his eyes this time, Sanji moving back as Usopp touched his stomach again.

"Maybe if we switch positions?" Sanji asked, wondering if he was somehow putting pressure on Usopp's stomach despite his best attempts not to.

Usopp breathed deeply for a minute before nodding and slowly turning over. He was careful to avoid touching his stomach to the mattress, lifting himself to his hands and knees and clenching the sheets to regard Sanji over his shoulder. "Like this?" he asked.

Sanji nodded and reached out to grab Usopp's hips and pulled him closer. He sighed through his nose as their bodies line up and fit together, this time without any kind of cramps. Usopp was too engrossed trying to hold back his moans to really pay attention to discomfort, his voice still audible despite his best efforts to bite his lip. Sanji studied Usopp's back for a moment before leaning back and shoving forward once again.

"Ooh…"

"How's that feel?"

"Mmm, better, nnn!"

Sanji chuckled under his breath and thrust a bit harder, making Usopp moan louder and buck back against him. Usopp leaned down, his upper body touching the mattress while his rear stayed up in the air, and he started groaning and whispering Sanji's name under his breath. "Oh god, S-Sanji, ooh."

The cook picked up the pace a little, still watching Usopp for any signs of discomfort. He faltered a bit when he found one as Usopp turned his head to the side, displaying obvious tears beading in the corners of his eyes. "H-Hey, is this hurting you?" he asked.

"Huh? N-No, why would you-" Usopp asked, cutting himself short to inhale sharply. Sanji's last thrust sent a jolt of pain through his side, and he realized after letting out a pained grunt that Sanji had caught on. "Ouch! Shit…"

Sanji sighed, pushing Usopp to lie on his left side after pulling out again. This time, he lifted Usopp's leg and moved to lay right next to him. Usopp gulped a bit while Sanji laid his leg to stretch across his hips. "Hold still," he whispered, pushing forward with his hips and watching Usopp's face for a signal.

He felt Sanji enter his body again as the cramp subsided, pressing his lips together and nodding as Sanji started moving. "Mmm! Oh gosh."

The blond, absolutely certain sex was finally possible, traced his hand up Usopp's leg and pulled him closer by his hip. Usopp panted as his length rubbed against his stomach, the ache of his cramps subsiding. Both of his hands grabbed for Sanji's shoulders, his back arching and body moving to meet Sanji's hips.

They continued to move, lips meeting and tongues tangling against each other until Usopp found it hard to breath. "Ha, w-wait, ahn! S-Slow down, mmm!" He gasped, his stomach starting to ache once again.

Sanji froze, both of them struggling to breathe and Usopp let out a small whimper of pain. "Ah, damn it. Sorry," he panted, hand touching his stomach.

"Its fine," Sanji said as he stroked Usopp's hair and caught his breath. "M-Maybe we should stop. Maybe sex is just making them worse."

"B-But we're still-" Usopp started, wincing as Sanji pulled out and moved his leg back into a comfortable position. "What're we gonna do about…" He found it a little hard to finish his sentence, choosing to reach down and grab Sanji's length.

The touch made Sanji blush a bit, but he tried to pull Usopp's hand away and he replaced the small pang of disappointment with a smile. "It's alright, honest. We can try again when you're feeling better. For all we know, this is still some weird complication thing with that muscle you pulled last week," he said. He shifted, crawling over Usopp's body to lay behind the other man, and wrapped an arm around his side to spoon against his back. "Let's just go to sleep."

Usopp rolled his eyes. "You're not gonna go to sleep, and neither am I if that thing keeps poking me," he mumbled, scooting his body back a bit to bump his rear against Sanji's tip. "You sure you don't wanna take care of it? We can do something about it."

"Nah, I'm good," Sanji said, pushing himself up and kissing Usopp's temple before reaching to the nightstand and turning off the lamp. The room went dark as he resettled against Usopp's back, the dark haired man sighing through his nose as the cramp started to waver. "Night."

They laid there in silence for a few seconds, Sanji pressing feather kisses against Usopp's shoulder. Usopp smiled as he wiggled back a bit, blushing as he felt Sanji's length against his backside. The cook gasped under his breath, grip tightening around Usopp's waist, before Usopp pulled his arm away and ignored the cramp that threatened to return. He pushed Sanji to lie on his back, lifting himself to sit across his lap, and he heaved a bit while adjusting himself and aligning the head of Sanji's length with his entrance.

As Usopp sunk down on his body, Sanji moaned and looked at Usopp as he rolled his head back. "Wh-What about your cramps?" he asked, biting his lip as Usopp started to move.

"Sex or not, I'm gonna get 'em anyway. Read it on one of those pregnancy sites," Usopp whispered. "Can't leave you hard as a rock either."

Sanji chuckled, hands reaching up to touch Usopp's hips and move him just a little bit faster. "You could've warned me you were gonna get cramps."

"You weren't gonna touch me if I told you."

"Hah. You sure about that?"

"Less talking. More fucking."

"I think you're getting mood swings already."

There were no other words spoken as Sanji and Usopp moved together for a few minutes, finally reaching a climax before long. Usopp was more responsive and easy to distract when Sanji touched his stomach and chest. When they were completely satisfied, Usopp gingerly moved to lie on his side again, facing Sanji and ignoring the ache forming in his gut. "Okay, that was a little harder than I expected," he panted.

"You're the one who started thinking with his dick," Sanji chuckled, touching Usopp's face as the dark haired man started to grimace. "And you're gonna be up with cramps all night. Should've thought that through, huh?"

"Ow, ow, shit, that was a bad idea…"

"Hold on, I'll get a remedy for cramps."

"Ooh, no more sex. No more-OWW! No more sex… Not for a while."

"… You're shitting me, right?" Sanji asked. Usopp didn't respond as he rubbed his stomach, rolling onto his side to cradle his stomach. Sanji sighed as Usopp moaned and shook his head, the cook tossing the blankets away from his body to search for a heating pad.