I posted this story on AO3 a few days ago (because it's *cough* explicit *cough*), but I figured I would post the first few paragraphs here in case anyone was interested...
Gently biting Sanji's lip before kissing him once more, the navigator pushed herself up. Her hands rested against his torso as she straddled him. With her coy smile returning from earlier, she whispered, "You can do it this time."
…
"Nami-san…?" Quickened breath caused the cook's chest to rise and fall rapidly underneath her fingertips. Despite the confusion on his face, his hands were already caressing up her thighs to her hips. His touch lingered as he slowly passed over the ties at the side of her bikini.
The navigator would never admit that she was thinking about him while she was changing in the bathhouse. Remembering the dream she had about him from the night before caused the blush in her cheeks to grow a shade darker. It was fate, luck, or good timing that he happened to walk in on her. If it weren't for his stupid nosebleed, who knows what would have happened after her little show… Then again… here they were in a similar scenario anyways.
Biting her lip, Nami ignored the urge to press her hips against his. It didn't matter how much she wanted him, she knew teasing him would make it that much more fun when he couldn't contain his passion for her anymore. Gathering her cotton T-shirt in her hands again, her own heartbeat sped up. "Sanji-kun," her voice was breathy and hushed. "Are you ready?" ...
You can find the complete story on AO3. Either search by "namibean" or the title. Enjoy! ^^