All the characters in this story engaged in sexual acts are over 18.
This is part 2 of the series. Part 1 was a bit vanilla. If you liked it, that's great but if you don't like watersports maybe this one's not for you.
This is how part 1 ended:
"Nice thought though, isn't it? We make each other so horny because it's wrong. You wanna see how dirty we can get?"
"Hell yes. I wanna do everything with you, little sister."
"
Little?
I'm almost an hour older than you."
"Yeah, but you're shorter."
"Doesn't count."
She snuggled into my shoulder. We fell silent and dozed off briefly, but a freshening breeze through the window on our wet sweaty bodies made us cold. She woke me.
"I'm cold. And we both need a shower."
"How about a bath?"
"Oooh, nice. I never fucked in a bath before."
"Who says I'm gonna fuck you?"
"I do. Come on."
I didn't know if I could cum three times in a day, but if anyone could make me it was Rosie, my lovely sister.
The bath was deep, but not long. As the warm water rose, I stepped in and helped Rosie. She had one leg in the bath, one outside, so her legs were wide apart. She saw me looking there and opened her flower for my better view.
"Like it, brother?"
"Oh yes. Such a pretty one."
"How many have you seen?"
"Including yours? Two."
She laughed and completed her step into the bath. We sat opposite each other, my legs between hers. The water was waist-high, steaming. Rosie splashed her tits, I looked at them fondly. Her pink nipples hardened, water glistened off the top of her rounded orbs then dripped off the bottom. She watched me watching her as she played with them, teasing. One hand went between her legs. She knelt up, so I could see as she began fingering herself and playing with her clit. I stroked myself gently as I watched.
Water dripped from her pussy lips. I saw a small spurt, pale yellow. I looked at her, she was smiling, and just said: "Watch."
I watched. She teased her clit and relaxed, and a spurt of pale yellow liquid splashed into the water above my thighs. My sister was trying to piss for me. I watched eagerly, afraid of missing even a second. My cock was truly hard now, waiting for her show.
Patiently I waited, and I got my reward. Rosie fixed her eyes on my cock and managed a short stream that splashed again into our bath, then another, then she let go completely. I watched it stream from her pussy and heard it hiss and splash. I had fucked my sister, cum on her, licked her to orgasm. But
this
I found utterly erotic like no dream I'd ever had.
Rosie's fingers lifted slightly and her arc came closer to me. She was offering, and I wanted to feel it. I lifted my body out of the water. The hiss continued but the sound changed as her piss now splashed onto my stomach. I reached for her, let her pee on my hand and arm.
I could have explored this taboo for hours, but inevitably her stream sputtered to drips and stopped. I stared as the last drops fell from her honey pot, then looked at her.
"How did you know?"
"You used to watch me, remember?"
I didn't know she knew. "Wait. You mean you
knew
I was watching?"
"Yes."
I processed that. She was right. Before she was married we spent lots of time outdoors. Whenever she needed to pee, I'd sneak up. Sometimes I got lucky, mostly not.
"So, you peed knowing I was watching?"
"I told you, yes." She was gently stroking her pussy, still kneeling. "And just so you know, I drank lots of water, lemonade, whatever. Always did make me pee a lot..."
She was setting it up to pee for me? All those times?
"How many times did you actually see me pee?"
"Four where I saw properly, coupla times I just saw bare bum or whatever."
"Four? Exactly four? You remember them?"
"Every detail."
"Hmm. Interesting. I haven't sat in the water yet. As my reward, I want you to taste me."
It seemed a fair deal. I touched her pussy lips and brought them to my mouth but she gripped my hand and stopped me: "I said taste
me,
not
it."
It was awkward in the confines of the bath, but with her standing I got my lips under her pussy. I expected it to be disgusting, so I licked tentatively. Bitter, salt, but not horrible. I licked until all I could taste was pussy.
"Good. Let me sit now before I slip and fall."
"Yes, your majesty!"
She laughed. "Oh, did I go all 'do as I say' just then?"
"A bit. Comfy now?"
She replied "Yes" as she swished low into the water.
"Good. I'm gonna kneel and you're gonna suck my cock."
"Hah hah. 'Yes, your majesty'"
She looked at me with questioning eyes: "You're not gonna piss on me, are you?"
"Maybe."
I was in front of her, she kissed the end of my cock and sucked the knob before saying: "Yeah, I guess that's fair enough. Not in my mouth though."
"Deal. Now shut up and suck."
Between slurps on my cock she said: "You're still a dickhead, Sammie."
She bobbed on my cock a few times then said: "It's kinda horny being told what to do. We should explore that game. Treat me like a slut, but don't hurt me OK?"
"I wouldn't hurt you. Except I intend to spank your lovely ass soon, but ..."
"What? How did