Noticing how Nami was starting to grow accustomed to the precise and intense pleasure being forced upon her, Robin decided to change things up. She, once again, popped the tip out of her mouth and collected whatever drool was still stuck on her lips and stared her lover's exquisite expression. With both her hands, Robin wrapped around the aching girl-meat and began to slide up and down the shaft.
Nami's voice grew louder once more as the focus on the pleasure entered the length of her cock instead of her sensitive tip. The hands squeezed, rotated and moved slowly up and down her length, stopping just short of her cock-head. With a pumping motion, Robin changed the pace every so often, just to keep Nami on her toes. If not for the cock-ring around the base of her engorged member, Nami would have ejaculated many times over by now. Instead, all she was rewarded with was the constant, harsh, boiling sensation in her testicles continuously attempting to release its contents.
Each thrust and pump of Robin's hands had enough authority to force Nami through a series of strong ejaculations – Each twist and turn could wring the sperm out of her bloated balls with little effort. All her needs would have been satisfied dozens, no, maybe hundreds of times already if it wasn't for that fucking cock-ring. Nami groaned, moaned and whimpered continuously for almost an entire hour before Robin decided to give her swollen cock a brief moment of rest.
"God…" Robin groaned. "I can't take another moment of this…" Robin slowly stood up from her kneeling position, and once of her feet, she stretched her muscles and gave of a satisfied sigh. "Much better."
Taking a few steps back, Robin allowed her lover to have a much better view of her entire physique. Robin's cock was almost as swollen as Nami's, but just not quite as big. The navigator stared intently at the massive girl-cock that stood erect just a few steps from her own. Even though she had been toyed with for so long, Nami couldn't help but to fantasize about how wonderful it would be to satisfy that tasty cock.
Robin teasingly slid her hands down from her ample chest, down the sides of her stomach until they reached her throbbing sex. With sensual movements, she wrapped her fingers and gently rubbed up and down the length. Her expression was one of pure lust and pleasure, slightly amplified to make her denied friend envious. And that she was – Nami couldn't take her eyes off of the lewd display in front of her and groaned alongside Robin's pleasurable moans.
The light rubbings soon turned into a proper, yet slow stroking. Up and down, with a slight rotation, Robin's hands traveled along her hard cock. Taking a few steps back to Nami, the perverted archaeologist positioned herself just by her friend's side, pressing her voluptuous body against hers. Her stroking never stopped as she leaned in and nibbled on Nami's ear, moaning and grunting softly as she continued to masturbate.
"Oh god… It feels so wonderful stroking my big, hard girl-cock, Nami." Robin whispered into Nami's ear. "I can feel the cum in my big testicles boiling. I need to ejaculate so badly, Nami – I'm sure you can understand my frustration.
"Mmmmph…"
The poor navigator could only wriggle and moan as Robin rubbed and stroked her cock against her thigh. Hot, sticky precum smeared all over her skin; almost as it Robin was branding her as her own. As she picked up, Robin began humping Nami harder and faster which each stroke. Her voice grew louder and far more lustful as well. Nami couldn't take her eyes off of the big cock raping her thigh. How she wished it could be her own aching sex that was being so viciously stroked.
"Mmmm, I can't stop, Nami! It feels so good! I bet you'd love for us to switch places, huh? To be the one stroking her massive, denied girl-cock?" Robin teased her. "Until it ejaculates…"
With that final sentence echoing in Nami's head, her cock tensed up and began pulsating like crazy. It jumped up and down as it desperately tried to shoot all the cum out that's been trapped inside her bloated sack. Of course, that was all impossible and all it managed to create was an ever more intense frustration and ache. She bit down hard on her gag and let out a series of whimpering grunts and groans. Over and over her cock jumped as it endured the tremendous pumps, every single one stronger than the one before.
Robin didn't care, she right out loved how difficult she was making it for Nami. She knew, to a certain extent, how badly she needed to cum, and how extremely frustrating it was not to. It was fine, though, at least one of them was going to cum. She raised her voice and moaned and gasped as lewdly and as perversely as she could into Nami's ear. Her hand flew up and down her engorged cock, she couldn't stop herself any longer – Nor would she, even if she had the control to.
"Fuck! I'm going to cum, Nami! Watch me as my cock ejaculates! Watch how good it feels to empty your tight, bloated testicles!"
Nami's eyes widened. How was she supposed to endure something as cruel as having to watch someone else ejaculate while she was stuck on the verge of cumming herself? As hard as it might've seemed, it was also the easiest thing in the world. Nami didn't have a choice after all. She was bound in place and had no free will of her own; at least she didn't have any right now. Robin's hot body pressed into her even harder. The heat of her skin was maddening, but her massive, pulsating girl-cock was even more of a torture to endure.
With a strong, lewd gasp, Robin stroked her cock as fast as she could until the pleasure was far too strong. Aiming the tip of her drooling cock-head towards Nami's own aching member, Robin pushed herself over the edge and finally let her frustration go. Her cock pumped and pumped, spraying ropes after ropes of thick, boiling ejaculate all over Nami's own twitching sex. Robin kept moaning into her ear, elevating Nami's arousal to an unbelievable height, all while coating her in large quantities of thick , hot and sticky semen.
"Aaaaaaaaaaah!" Robin gasped. "It feels so gooooooood!"
"Mmmmhmmmmhmmmpph!" Nami whimpered and sobbed in response, forced to endure her cock's desperate pumps and twitching as the searing cum coated her entire cock.
The semen just kept coming and coming without an end in sight. Robin was clearly backed up and after a few hours of intense teasing, even though she wasn't the one enduring the harshest parts of it, she had reached a point where it seemed like she had an endless supply of it. With her heaving chest and rugged strokes, Robin couldn't kept her aim straight and ended up coating the underside of her tits, as well as Nami's entire stomach and thighs. By the time her testicles had emptied, both of them had endured a heaping helping of delicious cum.
"Oh my… I really needed that." Robin stretched, sighing in utter relief.
"Mmph…" Nami was still throbbing and aching as if she was going to cum any second.
Ignoring the large amount of cum coating the underside of her chest, Robin grinned gleefully and slowly shifted her position until she was in front of her lovely slave. With a brief chuckle, she went down on her knees, trailing a single finger down Nami's semen-soaked stomach. The poor cat stared as her lover lowered herself, fearing what was to come next. Meeting her eyes, Robin smiled as sincerely as she could.
"Well then..." A brief, deafening silence spread throughout the room. "Time for round two…"