“Oh?”
“Oh, you mean…”
Her face softened. “You want to talk about Dad?”
My eyes widened. “No!”
A look of embarrassment appeared on Kim’s face, and I continued speaking without pause.
“I mean, I mean – no, thanks. I, um, we should…we should see if Mom needs anything else.”
Before I knew it, I was downstairs, not even noticing how flimsy the stairs were as I clambered down them.
When I got back to my room, I stood with my back against the door, breathing heavily. Fuck! What had just happened?
It felt like it had all been a dream. My sister, staring mindlessly at the screen. Repeating the lines that the tape gave her like a drone.
Obeying my commands.
Cumming, when I told her she was a good girl.
I couldn’t believe it. I’d seen my sister cum. I knew what Kim looked like when she orgasmed.
The way she moans, the way her body shakes, how her eyes roll back in her head with pleasure. It was unreal. Unbelievable.
And hot as hell.
My dick was rock-hard. I closed my bedroom door (Mom had taken the locks off straight after we moved in. Kim and I were adults, but she still treated us like children) and lay down on my bed.
There was a risk that my sister would come in, but fuck it. My balls felt like they were going to explode, and I needed relief.
I ran my fingers through my hair, then unbuttoned my pants. I pulled my cock free of my underwear, watching my shaft twitch as I touched myself. I stroked gently at first; I couldn’t remember ever being this hard.
“I will obey.”
My sister’s words ran through my head, the look of absolute obedience on her face. Her eyes were wide, her mouth slightly agape.
“I will obey,” she said in my imagination. “I will do whatever you say, master.”
“I’m here for your pleasure.”
I groaned. I was getting close. I could feel it, I was almost there.
“Please, master,” Kim begged. My hips were bucking, my cock throbbing against my fist. “Please…cum on me. Cum on your big sister.”
With a cry, I came. A wave of heat washed over me as my release burst out of me, the cum splashing against my stomach. My legs trembled, my fists clenched, my back arched.
I collapsed onto my bed, panting. Fuck…I don’t think I’d ever cum that hard in my life.
I wiped my hand across my belly, feeling the sticky mess that coated my skin, before the guilt set in.
Fuck. Fuck! I’d just cum, thinking about my sister. I’d just gotten myself off, imagining my own flesh and blood.
A few moments ago, that had been so hot. So taboo. But now, in a moment of post-orgasm clarity, I felt dirty.
Not only that, but…I’d let her watch that tape. I’d done nothing as a mysterious tape hypnotized my sister, making her beg to obey me.
Making her cum.
As I closed my eyes, I could see it, just as clearly as I had a few moments earlier. The look on Kim’s face as I’d told her she was a good girl, as she’d moaned with pleasure as she came.
What would my Dad think if he saw what I’d done?
That was the thought that really sobered me up. An image of Dad, looking disappointed at me. If he knew what I’d done…if *anyone* knew what I’d done.
Yeah. It wasn’t okay. None of it was okay.
As I pictured Dad’s expression, I realized…from the moment the tape had started until my sister had brought him up, I hadn’t thought about Dad once.
It wasn’t like I was obsessed, it just…y’know, came up a lot. You only get one father, and he’d only been gone a few months. I’m pretty sure it was normal that everywhere I turned, I saw a reminder of him.
That was why we’d moved, I knew. Being reminded of Dad was bad for me and Kim, but for Mom…
Yeah. She hadn’t been able to deal with it.
But all the time my sister had been watching the video, obeying my orders, I hadn’t thought about my dad once. It was like when I played *Overwatch*, or any of those games. It took me out of myself. It allowed me escape the grief.
I sighed. I didn’t know what that meant. Did it mean anything?
Maybe I did need therapy. Masturbating while thinking about your sister wasn’t normal, I was sure of that. Of course, neither was finding mysterious tapes that made her kneel in front of you and pledge her allegiance…
***
I didn’t see Kim again until later that night. Mom didn’t end up finding any other tasks for us, so I just spent the day in my room, watching YouTube videos of people playing basketball.
I came downstairs for dinner – my parents were big “we eat together” people, and Mom had continued the tradition even after…even now.
“Hey,” Kim said, looking at me like nothing was unusual.
Like I hadn’t watched her cum, just a few hours earlier.
“Hey,” I replied cautiously, not sure if she was going to suddenly remember what we’d done and freak out.
She just shot me a smile, and we sat down to eat.
Dinner was quiet; it was a meal Mom cooked all the time – *yakisoba*, Kim’s favorite.
We didn’t talk much, so it took me most of the meal to notice. Twice, Mom asked Kim for something – to pass the vinegar, or pour her some tea.
Both times, my sister obeyed immediately, without hesitation. Nothing unusual about that. Mom’s requests weren’t exactly draconian; I would’ve done the same if she’d asked me.
What was odd was the look on Kim’s face. I don’t think Mom noticed – I only did because I was watching my sister so closely, trying to make sure she didn’t suspect anything.
After Kim obeyed Mom’s polite requests, she blushed. The second time, she bit her lip.
And both times, her eyes glazed over with lust.
Apparently the video’s instructions hadn’t faded after my sister’s orgasm. She may not have remembered what happened, but apparently the commands were still there, telling her to be obedient. Submissive.
Telling her how much she loved to obey.
Once dinner was over and my plate was cleared away, my sister got up and headed upstairs. I sat at the table, torn.
On one hand, I…I already felt so guilty about what we’d done. What I’d done. Kim was my sister; yeah, she could sometimes be a bit of a pest, but I was meant to look after her. She was family, y’know?
On the other hand…
Well, truth be told, there wasn’t another hand. The first hand was holding every relevant piece of information. It was all completely clear. Kim was my sister, end of story. What we’d done already was completely immoral. Doing anything else was unthinkable.
There wasn’t another hand. Or if there was, it was between my legs, wrapped around my erection. Metaphorically, I mean.
I knew I shouldn’t do anything to take advantage of my sister’s artificially-induced submission. I *couldn’t*. It would be so, so wrong.
But my dick thought otherwise.
Well, I’m proud to say, my dick lost that battle. After almost half an hour of wrestling with my conscience, I didn’t follow my sister to her room. I didn’t experiment, learn how she’d react to being told what to do.
See if she’d cum again if I called her a good girl.
Instead, I went to bed, and dreamt of what would’ve happened if I had.
***
For the next week, I…god, I couldn’t help but notice. It wasn’t like she was super obvious about it, or anything – like I said, Mom didn’t notice a thing.
But every time someone told Kim what to do, she’d scurry to obey. She’d immediately follow every order she was given, and that look would appear on her face.
The look she’d had when she came.
I say ‘someone’ – really, it was just Mom. I’d never really noticed before how bossy my mother was. A dozen times a day, she’d ask (“ask”) me and my sister to do little things for her, stuff that she probably could’ve done herself.
Was she like this with Dad? I had never noticed.
A strange feeling appeared in my gut as I realized that I’d never know. Dad was…he was gone, and he wasn’t coming back. Anything I hadn’t noticed while he was gone, I’d never have another chance to notice.
I shook my head, and tried not to think about it.
The first time, it was an accident. I swear. I’d been on the other side of the room, and I’d asked her without thinking.
“Hey Kim, could you turn on the lights?”
She’d been entering the room where I’d been on my phone, but even in the dim lighting (the sun had gone down while I’d been reading reddit, desperately trying to distract myself from the feelings I knew I shouldn’t be having) I saw it.
The look of lust on her face. The way her entire body shivered, like someone had just run their fingers up her spine.
The expression of desire as she obeyed me.
It was more obvious than it had been with Mom. With Mom, it had been more like…I dunno, like someone had offered her a sip of their milkshake.
report When she leapt to obey me, it was like someone had given her a hot fudge sundae with everything.
There was just this look of *satisfaction*, of pure bliss on her face.
As she obeyed her master.
I tried to pretend I hadn’t seen it, tried to tell my cock that I was imagining things. But when the lights came on, there was no denying it. I reckon even Mom would’ve noticed something if she’d seen Kim’s face in that moment.
I couldn’t help myself. I mean, I should have. I should’ve said nothing, just turned back to my phone.
But I didn’t. Instead, I said it – two short, simple words.
“Thank you.”
Kim’s eyes fluttered, and I swear, she had a like…mini-orgasm. Her her breathing deepened, her lips parted, and she looked at me and just…smiled.
She smiled, and my cock almost burst out of my pants.
“You’re welcome,” she said demurely, and there was a skip in her step as she left the room.
That was it. “Can you turn the lights on?” “Thank you,” “You’re welcome.” Ten words that sealed my fate. Our fates.
Ten words that set me down a path that I couldn’t come back from.
I jerked off again that night, something I’d avoided since the attic. I hadn’t wanted an image of my sister to unexpectedly pop into my mind as I did, y’know?
But after seeing her reaction to such a simple request, I couldn’t stop myself. I replayed that moment as I wrapped my fist around my cock, remembering what my sister had looked like. What she’d sounded like. The moan in her voice, the lust in her eyes…
I tried to tell myself that I was just getting it out of my system, that this was it, that after tonight I’d never think about it again. But for the rest of the week, I kept jerking off to that scene. My heart pounded in my chest as I came, night after night, spurting white cream onto my stomach as I pictured how much pleasure my sister got out of obedience.
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