Cumming Clean

I woke up early Saturday morning. My sister is an early bird, so she's usually up hours before me, but today, I set an alarm. Despite my sister's knew found trust for me, she'd still rather me not be present while operating her fast learning machine, or whatever she calls it.

I tip toed to her lab, and to my luck, I heard the sound of a computerized voice reading off words. I **** my way through the door and saw my sister sitting there naked. Her nipples were still hard because of the broken air conditioner. It would be so easy to just touch her right now. I lose my self control and gently rub her tits. I stare at her. The realization that she's totally **** right now fills my mind. She has no way to stop me from staring at her beautiful naked body, I think as I mindlessly rub her tits. She doesn't seem to stir. I take it a step further and gently touch her pussy, feeling her and all of her warmth. It looks recently shaven. Despite being a tomboy, I guess Diana still likes to feel a little feminine. I slowly rub her clit and feel her get wet from my touch. I can feel her breathing increase, so I stop.

I can't get caught. Not now. I'd have no way of explaining myself, trustworthy or not.

I go over to the control terminal and type in the following:

Growing up, you and Thomas were very close, so you don't feel the need to lock any doors inside the apartment.

Since you and Thomas are already comfortable being naked around each other, and because you are very environmentally conscious, you often push Thomas to take a shower with you.

That second one may be pushing it, but maybe Diana's mind will be willing to accept it.

I watched anxiously as the program made its way towards my paragraphs. It reads off my first "fact" without a hitch. It freezes up a little on my second command and my heart drops, but it continues on.

Still exhausted, I make my way back to my room and go back to sleep.

I wake up later in a sweat. I guess Diana finally got around to fixing the thermostat, as she prefers it to be a hellish temperature at all times for comprehensible reason. I make my way to the living room and Diana is watching T.V. in the nude. This wouldn't normally be noteworthy nowadays -- like I appreciate the view and all, but I am starting to get used to seeing Diana naked as she goes through her mundane day. What is noteworthy is that she's sat in a bungee chair, with a rope going in between her ass cheeks like a thong.

How she can manage to sit there for so long comfortably, I don't know. But, who am I to question it. I just enjoy the view of her spread cheeks, open for anyone who happens to walk by to see. It just so happens, that "anyone" is all exclusive to me.

She turns around and notices me, but doesn't seem to care about my fixed gaze.

"Morning Tommy," she says teasingly.

She knows I hate that nickname. It always makes me feel like a kid.

"Morning sis. Whatcha up to today?" I ask.

"Not much," she says as she gets up and walks over to me.

As she gets closer, she makes audible sniffs and scrunches her face in the cuteness manner I have ever seen.

"Gross! You smell like BO Tommy. I haven't showered yet. Will you please just join me?" Diana begs, with the most adorable pair of puppy eyes and pout you have ever see. "Did you know that if we don't start now, we will run out of fresh water by 2050?!" she continues

Now, I am not a slob myself. I think smelling like body odor is pretty gross outside of certain activities. I would happily shower without any further reward in mind. Diana asking me to do it with her is a cherry on top. Of course I want to shower with Diana, the girl that I have secretly fantasized about for the last 15 years. I was about to instantly say yes, but I realized something. Because of the way I wrote my rule, she thinks that she wants to shower with me more than I want to shower with her, so I hold my ground.

"Eh Diana. I don't know. What could you do to convince me?" I said, hoping she wouldn't back out.

"Come on. Isn't saving the planet enough!" she said, raising her arms in the air for emphasis, which had the unintended byproduct of making her tits jiggle.

I was close to breaking, but I stood my ground.

"I don't know sis. I'm sure you could do something else for me. What if you brought your friend Amber over?" I said hopefully.

Amber was Diana's roommate from Uni. They kept in touch and still call each other besties (yes, even this late into their 20s). Amber comes over occasionally, but Diana tries to avoid bringing her to the apartment when I'm home. Diana knows that I used to have a massive crush on Amber. But could you blame me? I don't like to objectify women, which I'm not sure I have a right to claim at this point. But Amber isn't just a modern beauty, she is also kind, intelligent, and sweet. Okay, but she's also pretty cute. She has long red hair and a nice ass. Her tits are petite, but in the best way possible. Her face is splattered with freckles, which I can only imagine extend down to her breasts.

"But you just want to stare at her! I know you don't want to just bang her, but I'd be more comfortable hanging out with her if I didn't feel like you were eyeing my bestie," Diana pleaded, but I did not budge.

"Fineee... please just shower with me" Diana begged, her hands pleading.

"Okay okay. Lets go."

She was ecstatic. She grabbed my hand and eagerly led the way to the bathroom. I watched the excited bounce in her step jiggle her ass the entire way there.

She put her hair into the cutest messy bun that I have ever seen.

"What are you doing?" I asked.

"Oh. I'm only taking a body shower," she replied.

What the heck is a body shower, I thought.

She turned the water on and started washing herself.

"Get in silly!" she said as she eagerly gestured for me to join her.

I got in at last, and watched the droplets of water move down her breasts. The water was very hot, so I turned it down.

"Hurry up Thomas! Stop standing around. You’re just wasting water!" she said as, to my surprise, she took things into her own hands and started scrubbing my chest with soap.

She did her best to keep her hair dry, but between cleaning herself and cleaning me, her hair bun turned wet and even more sloppy

She seemed annoyed that I wasn't helping, so she kept scrubbing you. Though, she seemed to avoid your private areas. Maybe she wasn't ready for that yet. But that's okay. The warm touch of my sister rubbing over my body was enough. Enough so that a boner quickly emerged in my lower area. I actively made a point to try to "accidentally" brush it on her leg every so often. She turned around to rinse her face. I stared at the beady suds running down her backside onto her petite, lightly freckled ass.

"Can you scrub my back for me?" Diana asks.

I rub her smooth skin and try to feel every curve of her spine until there is no more soap.

Without thinking, I grab my cock and gently wiped her ass clean with it.

She didn't react too negatively and even said "Thank you!" with only slight hesitation, like I did her a favor by feeling around her cute little butt with my cock. Maybe she didn't realize that I wasn't using my hands?

The thought of this turns me on immensely. I stroke my cock, slowly speeding up as I become more and more aroused. I am careful that she doesn't notice what I am doing. Soon enough, splurts of cum fire from my penis and land directly on her ass.

"Hey Thomas, I think you missed a spot," Diana says as she notices the strange substance that lay across her cheeks.

Without a word, I gently move my hands onto her ass. I slowly yet firmly scrub her wet ass, lathering my cum across the round, silky surface until she deems it's cleanliness to be satisfactory.

Just as soon as we started, we are done.

"See that wasn't so bad," Diana said playfully.

"It was okay I guess," I say, hiding my grin in my towel, "Just don't forget to invite Amber over."

"Okay okayy," she sighs, "But can we talk about something?"

Dinner passes and I head to my (our) room. I think about Amber coming tomorrow. I need to find a way to 1) get Amber into the fast learning machine and 2) make sure Diana stays out of my way and doesn't reveal what I've done to her.

Just then, I hear a robotic voice coming from the apartment. I just have to say, despite having this machine, I'm also really fucking lucky, I realize.

I make my way to the lab. This time, the door isn't locked so I can walk right in. I take a moment to take in Diana's beautiful body, her voluptuous curves. Smell is underrated when talking about someone's attractiveness. Smell can turn a 5 into a 10, or vice versa. Diana is already a 10 but her smell is something else. It brings her to a 20 easily. I breath her in and just want to melt into it.

I walk over to her and bring my boner near her skin. Very carefully, as to not wake her up, I pick up her limp hand and make it slowly stroke my cock. My pre-cum coats her hand and I leave it there. I walk over to the terminal and write the following:

You are perfectly comfortable leaving Thomas alone with your friends.

If Thomas asks you to, you will go out and buy the food of his choice without a second question.

You and Amber are extremely close and you have always been sexually attracted to her and open to the idea of becoming friends with benefits.

Even though it is totally normal to be naked at home, it is impolite to be nude while a stranger is home, unless they undress first of course.

I finish up and give Diana a quick kiss on the lips (which pair of lips is up to you). I then head to bed, content with the fact that Diana will soon join me, even if I am not awake.

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