In late August, a couple weeks before the start of James and Jenna's junior year, they drove out to a nude beach a couple hours north, just past the city. They would head out there on days that James and Jenna both had off from work. The beach was backed by these tall sand dunes, and there were several short privacy walls built up around the base of the dunes. The walls were c-shaped and made of cinder blocks with their access point abutting the dunes, forming a secluded nook. Most of the holes in the blocks were packed with sand and driftwood but some remained open, allowing secret views in or out. The friends favored one of the larger nooks so they could all lay out without feeling cramped.
At the beginning of the relationship with Bethany, Jenna wasn't sure if her feelings for James would change. Despite her fears, she fell deeper in love with James. He was so open with her and she knew he adored her, making her confidence soar. When they fucked in front of the mirror, she found herself watching him more than herself. She loved Bethany too, but the connection with James was deeper. As much as she didn't want Bethany to leave, she could feel Bethany pull away a little. Bethany started to spend more time with friends outside of their circle, going to bars and parties. Jenna noticed the change in her friend's confidence, and watched as guys undressed Bethany with their eyes when they were out together. Jenna was proud of the woman Bethany was becoming and knew Bethany would need to spread her wings soon.
On this particular day, the three friends arrived at the beach in the late afternoon. It was a weekday so the beach wasn't very crowded but there were some couples or small groups sunbathing in the warm sand. The friends would of course fondle each other behind the wall, not bothering to remain quiet as they made each other cum. They would watch the nude people through the holes in the bricks and openly fantasize about what it would be like to watch the strangers fuck in the open while everyone on the beach watched, including them.
Jenna was laying on her back with James laying between her legs, casually eating her pussy. Bethany was kneeling in front of the wall, watching a well toned thirty-something year old guy jog along the beach, his impressive cock swaying side to side as he ran.
"This guy's cock is massive when it's flaccid. I wonder what he looks like hard," she mused as she kept her eyes glued to the peephole.
Jenna was too relaxed with James mouth on her cunt so she didn't get up to look.
"Tell me what you would do to him if he was in this cave with us," Jenna said as she reached her hand out to Bethany and started massaging her little sun-kissed tit.
"I would start by running my tongue up it so he would get hard. Then right before he came in my mouth, I would stop and sit down on the wall and watch him slide in and out of my naked pussy."
This brought Jenna to a climax, and James sat up, wiping his face. The man had turned to jump into the ocean and was backstroking amid the waves when James looked out over the wall.
"If that's what you want, maybe we should make it happen," James said as he raised his head from between Jenna's relaxed thighs and sat back.
This is one of the reasons Jenna loved him so much. Their happiness brought him so much pleasure.
"Nah, I couldn't do that. I'd rather just keep it the three of us. For now." Bethany smirked devilishly and sat back down next to Jenna on the towel.
"The sun is getting pretty low now and there aren't many people left out there. Maybe we can give him a little show?" Jenna asked as she rolled onto her side facing Bethany.
James was digging a soda out of the cooler they left by the dunes. He looked radiant with his hard cock stretching in front of him, guzzling the cold drink, the setting sun casting an orange glow against his thin, muscular abdomen.
"How do you mean?" Bethany asked.
"If James sits with his back against the wall, you can ride him while you watch your guy."
Bethany considered this. If she did it, the guy and everyone else at the beach would be able to see her naked body from her tits up. It would be obvious that they were fucking. The idea was causing a stir between her legs. James walked back into the circle and sat against the wall, his hard cock gently swaying in anticipation.
"Sounds good to me!" he said, opening his arms wide.
Bethany chewed her lip. The sun was almost fully set over the ocean and the few people left on the beach were all facing it. The guy continued swimming along the shoreline. She wasn't even sure if he would see but she was willing to take a shot.
Bethany crawled over Jenna, pausing to drag her tongue along Jenna's round, tanned breasts then kissing her deeply before she sat down on James' cock. He slipped easily inside her as she was sopping wet and her pussy was now used to taking him inside of her. James gripped onto her hips and rocked her hips back and forth, looking up at her lightly freckled face.
She leaned back slightly as she found her groove, exposing her small tits to the open beach. Not wanting to obscure the view, James leaned his torso as far to the side as he could. He rested his head on Jenna's shoulder, who was now also sitting against the wall watching Bethany rise and fall onto James's cock.
Bethany's hair looked like it was on fire in the setting sun and her nipples were sitting erect and proud upon her dainty breasts. Jenna got up and exited the nook, wanting to see the view from the beach. She walked about 20 or 30 feet away, hoping to catch the guy's attention, then turned around to face Bethany and James.
Bethany's eyes were darting between her and the guy as she writhed slowly on James' cock. Even if Jenna hadn't known they were fucking, it was obvious from the outside. James was so tall that his shoulder was still visible, and Bethany had brought her hand up to it, bracing herself. Jenna looked back to the guy, who was walking out of the ocean. He looked up and spotted Bethany, his eyes locking on hers. Bethany smiled at him and increased her rhythm, now bouncing up and down with fervor, her little tits bouncing with the force.
The guy grabbed his towel and wrapped it around his waist, but not before Jenna and Bethany saw his giant cock grow. He continued to stare at Bethany. Jenna walked back to them and kneeled behind Bethany, straddling James' outstretched legs. Bethany had thrown her head back in ecstasy and was grinding hard into James. James continued to hold on to her hips but pulled himself back up straight, about ready to cum.