I lay in the grass with Retta for quite a while afterward, resting. That was probably the longest uninterrupted sex session of my life. Which, admittedly, was because my penis was stuck in her vagina. Which was a bit weird.
Retta was a beautiful girl - blonde, curvy, with this sort of luscious and soft look to her. And she was laying naked in the sun without a hint of shyness. And from looking at her, within about ten minutes I had a boner again.
I tried to cover it up with my thigh. Retta giggled. "You're a priper. That's not going away."
"Seriously?"
"Seriously." She sat up and rubbed her hair. It had quite a bit of semen in it. "Let's go down to the beach and get cleaned up."
The beach was just across the path. Retta walked over naked, as did her friends, Trudy and Millie. I wasn't going to get my shorts done up over that massive boner anyway, so I just sort of held them in front of myself.
There was a shower at the beach. Trudy dug shampoo and a comb out of her purse, and she and Retta started washing all the jizz off of them. I had a quick swim in the lake with Millie. She was obviously flirting with me, and obviously annoyed that I kept looking back at the shore to watch Retta rub lather over herself. By 'obviously', I mean that she would suddenly pop out of the water between me and Retta, her breasts swaying right in my field of vision, and accidentally brush against my cock.
Millie was a solid hottie too. I was just feeling a bit overwhelmed by hotness then. Couldn't I have Retta to myself for a few months and then meet her sex-kitten friends? There was Retta, slowly caressing her ass with her soapy hands, giving me these little sultry glances - and then there were Millie's little pink nipples in front of me, and she was saying something, and fuck if I knew what it was because there were way too many bare breasts around for me to follow a conversation.
After a while swimming got dull, so I lay on the side, Millie right next to me, of course. She ran her fingers over my chest and down to my penis, and after a few minutes she put one leg overtop of mine, so that her pussy was almost against my thigh. Every chance I got I craned my neck to look at Retta. She was rubbing Trudy's naked body down - while Trudy was saying, "I think my nipples are probably clean enough now, thanks". But she had a somber look.
Retta got out of the shower and squeezed the water out of her hair. "I have to go do something. Trudy, you've got spare clothes, right?"
"What happened to yours?"
"They're probably over in the park. Can you find them for me? I'm in a hurry."
"Take some time to dry off," said Trudy. "Retta, jeez! Don't go rummaging around in my purse when you're all wet."
"I can't wait," said Retta. She picked up Trudy's purse, undid the clasp, and stuck her arm in all the way to the armpit. "Where are the clothes? I can't find anything in here."
"In the dresser," said Trudy. "To the left of the pool table."
I coughed.
Retta pulled out a blue skintight minitop, but Trudy yelled, "Oh no, you are not wearing that. Your boobs are too big. They'll stretch it out."
"Fine." She reached back in and came out with a loose but tiny dress. The cleavage went very low, and the sides were cut all the way down to her waist. It must have been meant to just barely cover up Trudy's nether regions, and Retta was several inches taller than her. Half an inch of buttock hung out, and whenever the fabric moved at all there was a hint of pussy lips from the front. When she bent over, she showed off everything.
I gave it a thumbs-up.
Retta beamed. "I have to go but I'll see you later."
"I hope so," I said.
And Retta jogged off down the path. With every step her dress flew up, showing off her beautiful ass.
Trudy sighed. "So nobody's going to tell her that's actually a shirt?"
"Whatever," said Millie. She slid up right next to me, her freckled face an inch or so from mine, and said, "I'm going to fuck you now, all right?"
We kissed and I fondled her breasts, and her hand was on my cock. I pushed her away for a second. "This isn't just to make Retta jealous or something weird like that, is it?"
"Oh, no," said Millie. "If I wanted to make her jealous I would have you fuck me right in front of her. And not even let her join in."
That was a good enough answer for me. She climbed on top and pushed her pussy over my mouth. I tongued her out until she was moaning, and then she straddled my pelvis and started riding me. Her breasts hung in my face, and I licked her nipples and squeezed her ass as she rocked back and forth.
Two men were watching us from the path behind the beach. One was filming with his phone. Millie sat up, held up both fists, and raised two middle fingers. They reluctantly walked off. She bent down over me and nuzzled my neck, and shortly after that she came.
I'm a very visual person. I looked at her red hair, damp with sweat, and her pert little breasts, and her pink pussy stretched open by my cock. Then I looked over at her friend Trudy, who had lain down buck naked on the blanket not six inches away from us, trying to ignore the whole thing. She was a thin girl, built like a fashion model. Her little nipples were brown. I wanted to reach over and touch her, but she might still be mad at me for jizzing all over her earlier.
Millie climbed off me and lay down on the blanket. I sat up and looked at my cock. It was still at half-mast. "This is nuts."
"Get used to it," said Millie. She stood up and started putting on her dress. "And if I were you, I'd throw away those shorts. You'll never get them zipped up again. I like you better naked anyway."
Given the way everyone else dressed around here, it maybe wasn't too weird to be walking around in the buff. Millie's dress was just front and back panels held by ties on the sides. It was skimpy enough it seemed to actually emphasize what it was supposed to cover up.
"Trudy!" Millie snapped her fingers. "I'm hungry. Let's go!"
"Busy," said Trudy, who was doing nothing but lying in the sun with her eyes closed. "Bring me back something."
Millie and I walked up to the path. Walking next to her, I could look down and see the side of her breast, and at the right point in her stride, her dress went far enough forward that her nipple was almost there. I was hard again, completely. This was getting really annoying.
We came up to a open area where there was grass on both sides. A group of people were playing soccer on one side. The teams were apparently shorts and skins - one side was in little shorts or skirts, and the others were all naked or just in shirts. The goalie on the bottomless team was a priper too, I guessed. His erection stuck out in front of him. I really hoped he didn't take a soccer ball in the nuts.
There was another group of people coming down the path at us. They were singing and drinking wine straight from the bottle.
"Oh, no," said Millie. "Preppers. Get off the path and do not make eye contact with them."
"What are preppers?" I looked at the girl in front. She wore a miniskirt with a poodle on it, and a yellow sweater so tight I could see the outline of her nipples from fifty feet away. I glanced at her face and we locked eyes.