All characters in this story are over 18 years old.
"Good, isn't it son? Your ma's pussy."
"Oh yeah. And my sister's?"
"Oh, you had hers too? Yeah, son. Your sister's is good. Very good."
"Daddy I gotta pee again."
"OK punkin." He didn't move, he was still mostly hard inside her. I wondered how long her tiny frame could be astride our father before she cramped up. I guess she just didn't want to get off her dad's cock.
"Oh, um daddy? You want me to do it on you?"
"Well I was hoping to see it, y'know, natural-like. Not seeping through your panties like before."
Sandy giggled. She lifted slightly and sat back on dad's thighs. I was still inside mum from behind but it wasn't going to be for much longer. I was going soft. That is, until I saw my sister, legs wide apart, gushing pee onto our father's chest. A long, clear stream that broke into splatters and made his hairy chest wet. My cock twitched inside mum, came back to life.
To my surprise, dad opened his mouth. Mum laughed -- she knew him so well. Sandy pushed hard and got a spurt in there. I heard it like the noise of pee hitting the water in the toilet -- then dad swallowed. He drank his daughter's piss before Sandy spent the last of it on his belly.
Mum reached back as she pressed back at my newly-rigid cock: "You liked watching your sister pee on daddy? Huh?"
"Yeah, mum."
"You wanna watch me?"
"Oh yeah."
I looked over at the others. Sandy sat beside dad, holding his cock gently, smiling a warm smile at me. She sat in her own pee puddle -- dad was still laying in it. They wanted to see the show too.
I sat in the outdoor chair. Mum said: "Sandy, come help your brother." Sandy scooted over, took my cock in her hand and stroked firmly. She knelt close, the hand she wanked me with was up against her little titties. She looked up at me, then bobbed her mouth down on my cock. "Oooh, I can taste mummy's pussy. And your cum. Nice!"
Mum stood slightly to the side of us, her thighs parted, and she began stroking her clit. I remembered the sight of it up close, the taste of it. Sandy did a few bobs of her head on my cock then licked mum's pussy, and it went on like that for a couple of minutes. Dad watched, still sitting in Sandy's pee-puddle.
"Son, let me know when you're gonna cum, OK?"
"Sure mum. Won't be longgg! Ungh. Oh fuck, Sandy!"
She licked under my shaft, and I was close. My balls actually ached -- they'd seen more action in two days than they were used to in two years. "Oh mum, it's coming. Fuck, Sandeee!"
"Look, son!"
I looked. Mum's pussy spurted, then exploded into a hot stream of pale yellow pee that hit my cock and Sandy's tits. I looked at my sister, she smiled at me and jerked my cock. It exploded in her hand, jetting my cream onto her chest to be instantly washed away by our mother's strong pee stream.
And so those days went on. We settled into our new family dynamic. Dad still fucked mum, but now it was openly, in front of us, and we learned when we were invited and when we weren't. It didn't matter -- My sister and I were all each other needed. Our parents were a bonus.
Inevitably the spa retreat came to an end. On the last day, Sandy was the target for mum, dad and me. As I've said, with family it's different. Sometimes the agony of unending pleasure is focused on you, other times on one or more of the others.
On that day, there had been a storm so even the few locals had packed up from the beach and gone home. But not our family. As the storm flung warm summer rain on us, we took shelter in the forest. I hugged Sandy, dad and mum were canoodling beside us. Yes, even then sometimes we were just like a normal family. As the rain passed, we completed the short walk to the beach. It being cool after the storm, we were in jeans, windcheaters and so on. Sandy announced she was a little horny, and did we know anybody who could help?
Laughing, we fell upon her. Before long, mum lapped at her pussy. Sandy was on her back on the beach blanket fully naked, dad and me knelt beside her with our tracksuit pants at our knees, she had a cock in each hand and took turns sucking on them. My mother, so I'm told, is an expert pussy-muncher. Sandy's moans and rippling tummy only proved her claim to that title. Mum was still fully dressed in summer pants and a thick windcheater.
Sandy had a quick orgasm, mum licked it all up. I wanted Sandy, badly, right then. Mum always seemed to know, like mothers do. She allowed me to take her place. I lay on top of my sister, who welcomed my throbbing cock with her hand and guided it to her pussy. As I sank in, she smiled and hugged me close: "Hi, big brother."
"Hi yourself."
"I was beginning to wonder if you still wanna fuck your little sister -- have you been ignoring me?"
"Uh, no. Have I?"
"Well, maybe mummy's pussy has been too tempting?"
"Um, maybe. But you're so tight, sis. So tight."