Helping Sis Brush her Teeth

I spent the entire day searching the internet for information on the ActionsTrader app. It seemed there was no official website and the only available info came from a few user posts on Reddit. A couple users were claiming to have found it on their phone despite never downloading it. One had asked what it was and got told it was probably a virus. His following posts were on different subreddits and about completely different subjects so I suspected they had indeed removed the app from their phone. The other made a long post talking about what the app could do and ended up downvoted, people telling him to go post his stupid hypno-porn story somewhere more appropriate. I did send him a message, but a couple hours later, as the sun began setting, he had not replied.

I stared at my phone, wondering what to do next. Whatever this app really was it seemed to be working as advertised and it opened up a lot of interesting but morally dubious possibilities.

Of course, in my twenty year old mind, the possibilities all revolved around sexual gratification.

A knock on my door interrupted my thoughts. I looked up and my bedroom door opened, revealing my step-sister, Meera. She looked like a younger and even hotter version of Diya. She was wearing blue pajamas and had her long hair falling freely over her shoulders.

"Hey bro," she said, entering my room without waiting for permission. "Have you seen my tube of face cream? It's not in the bathroom."

"Uh..." I said, trying to focus on her words instead of her body. "How would I know where your stuff is?"

She rolled her eyes and walked out, saying something about me being useless.

I closed my door with a sigh and went back to my desk. Damn could she be annoying! I thought as I opened my laptop and started browsing the web once again. But then, as it seemed her cute face wasn't leaving my mind, I grabbed my phone and opened the app.

A card with her name on it was now displayed next to Diya's. I touched it and a new menu appeared. It was titled 'Meera Devi' and from the look at the current actions in 'New Trades' she was preparing herself to go to bed.

I clenched my teeth as I scrolled down the list of 'actions'. Among the top ones were: 'Getting ready for bed', 'Putting on pajamas', 'Reading a book'... I felt my heart beat faster as I thought about what I could do to her. Was I really going to fuck with her mind? And why? Just because I couldn't say no to my hardening cock?

But...

Where would be the real harm? If it worked, she wouldn't even mind the changes. She literally could not be aware of any difference between the original action and the new one so, why not?

Trembling, I selected the 'Brushing her teeth' action and searched for a suitable trade. My finger stopped as soon as I saw the 'Performing a fellatio on [?]' action. Its cost was 50ABs.

Tapping on it revealed an additional menu: '[?]' followed by a list of hundred of names and a box allowing me to search for a specific one. Each had a small thumbnail showing their face. I recognized a few of the top ones. They were Meera's friends and close family members. My name was among them and I immediately tapped on it. The confirmation window appeared and I confirmed my choice.

I breathed out slowly as a new line was added to her list of 'Current Trades':

'Brushing her teeth <=> Performing a fellatio on [David Mason]'

The displayed available ABs blinked and went from 88 to 38. It seemed I still had a bit left for some additional fun.

I went back to her profile and made a new trade for 15ABs: 'Wearing pajamas <=> Being naked'.

I grinned, thinking about what was about to happen if the app worked its magic just like earlier today. I had just mind-controlled my hot step-sister, and it felt so fucking hot!

I heard her moving around in the bathroom, right behind the wall and felt my heart beat faster than ever.

"What the fuck am I doing?!" I suddenly exclaimed as I felt guilt creeping into my mind. How could I do something like that? How could allow myself to manipulate someone else's mind?

I hurriedly tapped on the new traded actions and attempted to delete them. Unfortunately, there wasn't any option to do so. All I could do was trade the original action for a new one, for a price.

"Fuck!" I cursed, realizing that there wasn't any easy way to cancel my previous trades.

Suddenly, an idea popped up in my head. Maybe I could trade the original action for itself?

I typed the name of the original action hoping it would work and sighed with relief when I found it in the list. However, I froze when I noticed the price next to 'Brushing her teeth': 40ABs. I only had 23 left.

I groaned and went back to the second action, following the same process. I could afford this one, just like the current new action the cost of the trade was 15ABs. I tapped it but an error message appeared:

'Actions cannot be traded with themselves. Please use delete option to cancel a trade. Note: Deletion of a trade is only possible 24 hours after purchasing its last action.'

I frowned. What the hell? Why did it have to be like this? Was this really a technical limitation or were the creators of this app just fucking with me?

I stared at my phone, trying to figure out what to do next when I once again heard a knock on my door.

"David?" Meera called through the door.

I grabbed my head in frustration. This was a nightmare.

"I need to brush my teeth." She said, knocking again.

I exhaled slowly and stared at the closed door.

"Erm..." I mumbled. "Sorry sis but I'm busy..."

She remained silent for a few seconds before asking "Are you jerking off in there?"

My face turned red instantly and I could feel my cheeks burning.

"Yeah..." I lied, feeling embarrassed.

"Fuck, David, you're disgusting..." I heard her whisper.

Suddenly, the door opened and I gasped as I found myself staring at her beautiful naked body. She was standing in front of the door with a smirk on her face. She walked in, her big tits bouncing with every step and sat down on the edge of my bed.

"What are you doing?" I screamed, pretending to hide my crotch. I could feel my cock getting harder under my clasped hands.

"You wanna jerk off and I wanna brush my teeth." She explained with a giggle. "So let's kill two birds with one stone! I'm not going to bed with salad stuck in my teeth."

"But..." I stammered as my gazed drifted toward her breast. "You're my sister, Niya..."

"So what?" She asked, confused.

"And you wanna blow me..."

"Sooo? How else am I supposed to brush my teeth?"

I swallowed hard as she stood up and knelt in front of me.

"But..." I whispered as I felt my will power crumbling as she reached for my zipper.

"What the hell is up with you?" She asked, pulling my pants down. "You're acting weird."

"I'm acting weird?!" I exclaimed as she grabbed my hard dick and wrapped her sweet lips around it. "Oh fuck!"

She sucked me for several minutes, making me moan loudly as her tongue swirled around my shaft. I closed my eyes and tried to think of anything but her mouth on my dick, but it was impossible, so I finally gave up and opened my eyes again. I watched her pretty face bobbing up and down on my cock, her long black hair covering most of it and tickling my legs.

I sighed with pleasure as she took my entire length inside her throat, her nose pressed against my groin. I felt my orgasm building up and moaned louder as she continued sucking me.

"Niya!" I shouted as I felt my balls tightening. "I'm gonna cum!"

I finally shot my load inside her mouth and she groaned and moved back, letting my cock slip out.

She ran back to the bathroom, rising her head to avoid spilling any of my cum and I heard her spat it all out in the sink. Then I heard some water running and finally I saw her go to her bedroom, right across mine and close her door. A couple minutes later, as I was recovering from this surreal experience, I opened the app again and noticed, from the current actions list, that she was reading a book.

It seemed that as far as she was concerned, nothing unusual had happened.