He refuses, and Rose encourages him by offering part of her suit as collateral.

Originally written by Dragon God at writing.com

John ultimately decided that it wasn’t worth sacrificing his dignity to amuse these girls. “No, I’m not gonna show you my ass,” John exclaimed and promptly sat down, much to his discomfort. Rose and Lily looked at each other and leaned in to whisper with each other, John couldn’t make out many words other than “collateral” and “proposal” which confused him. But ultimately made him believe that they weren’t giving up on seeing him naked just yet. Rose than put a hand on his chest, which made John squirm and cover his crotch again, but realized she wasn’t trying to peak.

“We’ve been talking John, and we decided that we have a proposition for you,” Rose said as she sat down and made direct eye contact with him. “What do you mean?” John asked curiously, only for Lily to speak on Rose’s behalf,”If you let us look at your ass just for a moment, then Rose here will take off part of her suit so that you aren’t the only one having a good time!” John stared at Rose who simply nodded with a smirk on her face and mimed pulling off her suit. John was skeptical of this but if it would even things out and get one of them naked, if only a part, then he should at least try.

“If I do, s-show you…my ass, you promise you’ll do it?” John asked Rose cautiously. Rose clapped her hands excitedly and Lily said, “Yes! He’s gonna do it!”

John realized that there’s no backing out now, so he did what had no other choice to do. He made sure his erection was covered and he turned to face away from the girls so they only saw his rear. He heard the two giggling and John slowly raised his waist out of the water and Rose said,”Whoop!” and even smacked his ass, which startled John, who turned his head to see Lily recording this on her phone and laughing while she did it. John quickly sat back down after realizing much to Lily’s disappointment. John felt very embarrassed and they both knew he was but ultimately decided it was worth it. “Okay,” John said eager to forget about what happened,”I did the deed, you gonna hold up your promise?” Rose had a look that made John really nervous because he didn’t know if she would actually do it or not.

Rose then gave John a flirty smile and he was confused as to why, but saw her hand go under the bubbling water, John still didn’t know what she was planning but heard Lily make an audible, “Oh my God!” and began pointing her phone at her. John then saw Rose pull out her pink string bikini bottoms and started twirling them around in the air, “Deals a deal John!” she Said as she then put her bottoms next to John’s trunks and he hid them with it as well.

Rose then pressed herself against John and he felt even more aroused and erect since he could feel with his body that she was bottomless completely, and Rose even felt his body grow more hotter that not was before,”Well I think someone enjoyed that little show, wouldn’t you say John?” As she rubbed her finger up and down his chest, making his erection almost unbearable. “Why stop there, huh?” Lily said smiling, “How about we really turn the party up to a 10!” Lily and Rose shook their heads in agreement and John didn’t know how he felt about this. Lily’s statement was followed up by…