Becoming My Stepsister’s Submissive Slave — Part 6
Feeling close to the edge, and eager to keep the stimulation going, I obeyed and started thrusting the silicone cock inside of me while my stepsister grabbed and fondled my swollen balls.
If you’re new to the series, please start from the beginning:
“How was your day, little brother?” my stepsister asked as she sat at the edge of the bed.
I handed her a glass of red wine and knelt in front of her.
“I couldn’t wait for you to get back home,” I said, watching her dangle her heel.
This must have pleased her because she let her stiletto fall. As she did so, I held her sole and kissed it gently. She now held her other shoe in front of me. I took it off and kissed each of her beautiful toes.
“Such an obedient love…now stand up. Time for your inspection!”
I stood and peeled my pants, revealing my see-through lace panties and the small bulge of my chastity cage. I slowly spun, slightly bending my ass towards her to show the gem-shaped outer end of my buttplug, further humiliating myself, then went back on my knees.
“Oh my, looks like my little brother has stained his panties a lot, today,” Gabriela purred.
It had been seventeen days since my stepsister locked my dick and the amount of precum I had leaked throughout the entire day was clearly visible on my panties.
“I was thinking you should send Rachel a picture of your cute little panties and new cage, Ryan.”
“S-sis I…”
The mere thought of voluntarily showing my ex-girlfriend my condition made me want to disappear.
“I’m sure she would be proud of you, just as Lisa is.”
I twitched and widened my eyes, once again facing the horrible truth of that day at the office.
“Oh, how you jump to attention every time I mention her! Yes, she knows we have a special relationship, and she keeps asking me about you.”
“Lisa? S-she asks of me?”
“All the time. In fact, I think she wants to ask you out on a date,” she whispered in my ear, hugging me.
My head was spinning among all my conflicting emotions; my heart melting as I thought of Lisa’s beautiful smile, her sweet ways, her pretty feet on the office desk, and my stomach dropping in humiliation, thinking of a scenario in which I would have to explain to her what was happening that day, at my stepsister’s feet.
I pushed on my groin, as my dick strained against its prison.
“Oh, is your dick hurting?”
I nodded.
“Well, maybe you can earn your release,” Gabriela said, sensually removing her skirt, and then her panties.
She put her hands on my head and guided my face to her ass. I spread her cheeks as wide as I could then licked her perfectly shaved hole.
“Now, Ryan. What did I tell you?”
“I’m sorry, sis. May I worship your perfect pussy?”
She smiled, patted me on the head, and sat on my face. Her pussy became my entire universe. I started lapping and lapping, following the instructions she had taught me in all this time. And then I felt her grabbing my full balls.
“Yeah, get it all warmed up and wet,” she said, rocking her hips on my face, as she ripped my panties, exposing the plastic contraption. She tugged at my cage with one hand, heavily massaging my full, heavy balls with the other one. I squealed under her, and for minutes and minutes, this seemed to work her up even more.
Then she slowed down. She reached for the long necklace she was wearing, a long, thin chain ending up with the key to my chastity device.
“You know, I was planning on edging you for a couple of hours and then lock you up,” she said, and I felt a soft pressure and a faint clicking sound.
I was suddenly feeling less and less strain on my dick and smiled as my stepsister removed my cage.
“Sure, you’ve complained a lot, but I see you’ve not tried to break out of it so today you’ll get a small reward for being a good boy.”
“Yes, please!” I exclaimed with my first breath, as she pulled her most pussy away from my face.
“Oh, what enthusiasm,” my stepsister said and she reached for her bedside table, grabbing a box placed on top of it.
“You promised to only cum with my permission, remember? Since your cage will make sure you are obedient, I now need you to make a new promise.”
I gulped, nervously.
“This is going to be easy,” she said, spreading my legs and laying on her belly, between them.
My little dick sprang stiff in front of her, stupidly proud and glistening with precum. She spread my ass cheeks and pulled out the metal buttplug I had worn all day and I moaned as it stretched my sphincter.
“Oh, my stepbrother’s hole is suddenly empty and eager.”
Gabriela licked her middle finger and gently pushed it inside my rectum. She soon arched her finger upwards, finding my pleasure button and I released another long moan, as she started circling it sweetly.
“From now on, you will only cum like this,” she said, smiling viciously.
“G-God! Yes, I will do whatever you say,” I managed to say between my frantic breaths.
“Of course, you will,” she said, withdrawing her finger and pushing it in my mouth.
I sucked my ass juices from my stepsister’s finger until she was satisfied with the result and then she gave me the box.
“Open it,” she said, once again massaging my balls.
I obeyed and opened it. Inside the box, there was a lovely pink colored, very realistic dildo.
“You didn’t expect to receive yet another gift, did you?” she chuckled. “Now, now, what does a good boy say when presented with such a gift?”
“T-thank you, sis,” I responded, my heart beating faster and faster.
“Exactly. Now, this is a new lesson for you. I have explained to you long and hard the value of a big, powerful cock, how size actually matters,” she said.
I felt her hand on my ass again, smearing cold lube all over my hole.
“But there is a difference between knowing something and experiencing it.”
With that, she took the dildo from my trembling hand, rubbed it up and down my ass crack and I felt a horrific pressure on my hole. I tensed instinctively, closing up my sphincter, scared of the new intruder.
“Shh, relax, it’s okay,” she said and I raised my gaze, meeting hers.
I saw her fumble with the front clip of her bra. Gabriela unclipped it and the bra cups fell, releasing her big, voluptuous breasts. I was stunned.
“Good little caged boys always get special treatment,” she said, pushing my head into her chest.
I lost all reserve and I started licking and sucking her glorious, warm breasts, for the first time. As I licked my stepsister’s huge nipples, the pressure at my puckered hole increased, and I gave up, allowing the fake cock to go into my ass.
“You’re such a good boy, see?” she said, smiling. “This is just the starter one but I’m sure you’ll come begging me for a bigger size, very soon.”
I feasted on the breasts that I had desired for so long, but at the same time, I was feeling the heat starting to rise up in my anus. She was fucking me with the dildo at a steady rhythm. It was a new feeling, and I couldn’t believe how much I liked it. Pointing the direction slightly upwards, my stepsister started pushing it against my pleasure button and I felt that incredible feeling building inside my rectum.
“C-can I cum?”I managed to ask, leaving her breast for a second.
“Not yet. I want you to hold it,” she said and guided my hand at the base of the dildo.
“Let me see how you play with your ass, Ryan.”
Feeling close to the edge, and eager to keep the stimulation going, I obeyed and started thrusting the silicone cock inside of me. My stepsister grabbed and fondled my full balls just as I picked up a nice pace.
“I thought about your caged situation, and maybe sometimes I’ll want to unlock you as we play, and sometimes I won’t.”
She let go of my balls and ran her index finger along my tiny slit, oozing with precum.
“And I want you to be able to cum in your cage if I so desire.”
She coated two fingers in my juices and started stroking me very slowly.
“That way there’s no need to edge you anymore. You’ll be sensitive and ready to cum whenever I want you to. If I want you to. Understood?” she said, her pace increasing.
I moaned as I started thrusting the dildo in my ass, faster and faster, until my hole felt like it was burning.
“Now, I’m going to count from ten to one, and I want you to cum on one, is that clear?”
I nodded.
“Ten.”
She started stroking harder.
“Nine. I plan on draining your little balls regularly if you behave.”
Just hearing those words brought me closer.
“Eight, seven. Otherwise, we’ll get you all locked up again.”
I increased the rhythm of the dildo, as I understood the serious implications of not cumming when my stepsister wanted me to.
“Six. Yeah, that’s my good boy. Five. Ryan, you look so sexy fucking your own ass like that. Four. That’s it! Three. Feel that cock inside you, feel the pleasure and think how hard must have Rachel orgasmed, having twice the size of that cock deep inside her. One. That’s it, cum for me! Cum for Rachel!”
Gasping with tears of joy, I managed to cross the finish line right at the end, but my stepsister withdrew her hand and I ended up shooting a shy dribble of cum, then another one, as my little dick trembled helpless and ruined.
“Oh, there you go, let it all out,” Gaby said as I cried out in frustration.
She kissed me passionately, waiting for my climax to end completely before caressing my member again.
“I’m so proud of you,” she said as she collected my cum and fed it to me.
The ruined orgasm had left me frustrated and wanting, deprived of relief, and still horny. I had no post-nut clarity, just an accent of rage that was promptly replaced by desire. After just a couple of minutes, I felt an orgasm rising again as she stroked me.
And suddenly I felt a slap on my balls. And another one, and another one. I cried out in pain, wriggling in her grasp, trying to escape but she got me once again. I felt the pain rising, and something surrounding my dick, pushing it down, my erection quickly giving up. I lowered my gaze just in time to see the click of her key, as she locked my dick back into its cage.
“Good boy!”
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