All the characters in this story who engage in sexual acts are over 18.
*****
After a torrid first day on holiday, the Delaney family had all managed a good night's sleep despite how warm the night had been, even Mike whose mind had returned time and again to the erotic events of the day before. In that time he'd watched both of his sisters
and
his mother peeing. He'd been jacked off by his twin sister who had also watched him piss, he'd been watched masturbating by his other sister, and he'd ejaculated watching his mother in the shower.
In the early morning coolness, he awoke and took in his surroundings. His parents had the end compartment, separated by a curtain from where Lizzie and Sammie slept, then another curtain denoted his 'room'. With the curtains pulled back and the camp beds and bedding stowed, the same area became the main room once the chairs and table had been moved back from the walls.
The curtains were quite thick, but anybody on the other side could usually be seen in silhouette. And they were old and torn in places. Mike peered through one hole and saw his sisters sleeping soundly. His heart ached. He loved them both so very much, but he was conflicted. He was in a sea of incestuous lust and he didn't know whether he would sink or swim.
He saw movement and at the far end his mother's silhouette was framed by the dawn light coming through. It was obviously his mother. His father didn't have tits like that.
He groaned in his mind. He hadn't even got out of bed yet and the erotic assault on his senses had started. He rolled on his side and peered under the curtain. His mother lifted off her nightshirt and bent over sideways. He could only see the curve of her back in shadow now, but she was only five metres away and he was shocked to realise she was bobbing up and down gently. She was giving his father a morning glory blow-job. Only once before had he witnessed intimacy between them, also in this place, but then his father had fucked his mother in the shower while he watched through the peep-hole.
He heard his father breathing hard and grabbed his own cock as it swelled.
As he watched he became aware that Lizzie had woken too and was looking straight into his eyes across their sleeping sister, still snoozing between them.
Mike gestured towards the other enclosure, and Lizzie turned to look. Her head shot back to look at him, her mouth wide open in shock, with a broad smile on top. She looked back and the twins watched as their mother went down on their father right there in the early light.
Mike was stroking himself and Lizzie played between her legs. Before long it was over. They heard Paul's stifled moans as he unloaded. Just as he did Suzanne sat up and Mike guessed she was taking his cum on her ample tits. Lizzie mouthed "Oh
WOW
" then pretended to be asleep.
Lizzie waited long enough to maintain the illusion that they'd been asleep during the morning glory, then yawned and stretched, calling gently for her brother: "Mike? You awake yet?"
He whispered yes.
"Let's go to the river. You know how lovely the water is this early."
"OK"
Then Sammie chimed in; "I wanna go too."
They hadn't realised she was awake, but within minutes the three of them were dressed in shorts and tees and pretending to sneak past their parents so as not to 'wake' them.
It was 500 metres to where the river negotiated a long, slow curve before increasing pace over a small rapid. The water was fresh, clear and cool all year round. Of all the things here, the family loved this spot most.
"Are you wearing your bathers, Sam?" Her brother asked.
"No, just my undies. It's OK, I can swim in my undies and bra with you guys."
Mike looked at his twin and she shook her head that no, she hadn't brought bathers either. That made three ready to swim in their underwear.
At the inside of the curve, the river bank was almost flat. They had jumped from the high bank on the other side as little kids, until Paul had explained about dangerous underwater logs and things they couldn't see.
In her innocence, Sammie stripped to her bra and panties as soon as they arrived and started gingerly into the water.
"Ooh, it's cold!"
Lizzie and Mike were not far behind her. Lizzie managed to trip and wrestle her brother so he fell in, then sly Sammie did the same to her. Laughing like children at play, they splashed each other. Sammie was still standing in thigh-deep water splashing at the twins. She was oblivious to how the splashing she was getting back was making her plain white bra and panties entirely see-through. Lizzie tried to coax her in: "Sammie darling. Come on in. It's really not too cold."
Sam's erect nipples poking through her bra said otherwise. Mike took his twin sister's cue and to save Sammie embarrassment began to swim strongly across the river. Lizzie took the moment to gently point out the show she was giving them. Sam abruptly swished forwards to swim to Lizzie a few metres out. She asked her sister if Mike had seen.
"Oh, I don't think so. I think he swam away first. It's OK."
"Yeah but. Well, look at you. I can see your titties through your bra too. And I bet I could see your, um, pussy too if you stood up! What will we do?"
Lizzie walked back to the bank and stood up facing her sister. "I'll just check. Ooh, so you can. Never mind..." and she swam back to her sister.
"You're really pretty Lizzie. All the boys say so. And, I don't know if I should say but, well, Mike kinda looks at you a lot too. I bet he wouldn't look at me like he does at you."
"I bet he would. You're gorgeous Sam. Very pretty. I wish I had your legs, my calves are too thick."
"No way! If I could swap my legs for your tits maybe!"
Mike swam back.
"What are you girls giggling and cackling about?"
The girls swapped a sisterly glance, and in unison said "Girl stuff!" then laughed hard at themselves.
He smiled: "Oh OK. No boys allowed. I get it."
Lizzie exaggerated a pout. "Oh poor Mikey-wikey been left out!"
Sammie giggled as Mike lunged at his sister and threatened to tickle it out of her, which he proceeded to do.
Lizzie's squeals echoed along the river valley. Mike always knew she could not stand tickling for long.
"OK, OK. Stop. We were talking about how pretty we are."
"And you are. Both of you."
Sammie visibly melted. "Really? Am I Mikey? Lizzie's real hot but, well, I'm not. Yet."
Mike made sure she knew. "Like hell you're not. If I weren't your brother, geez, I dunno..."
