Sophia rose slowly from the floor, her movements careful and deliberate as if she were trying to preserve whatever scraps of dignity she still had left. She crossed her arms in front of her chest, but the gesture only served to push her massive, heavy breasts upward and together.
The pale, soft globes overflowed around her forearms, their full weight causing them to jiggle and settle with every small shift of her body.
It was the look of someone who had just won something far more valuable than any game could offer. In his mind, he had. My older sister had just agreed to become his slave.
The word itself still echoed in my head like a bad joke that had turned horrifyingly real. I sat there on the floor, my softening cock still slick with her saliva and the remnants of my own release, watching the scene unfold with a sickening mix of guilt, helplessness, and a dark, shameful undercurrent of arousal I couldn't fully suppress.
Sophia shifted her weight from one foot to the other, her heavy breasts swaying and jiggling with the motion.
"Fine," she said, her voice calm but edged with tension. "You want me to be a slave? I'll accept. But one week is too much."
Tim's grin didn't waver. He tilted his head slightly, studying her like he was already planning his next move. "Is that right?"
Sophia nodded, uncrossing her arms just enough to rest her hands on her wide hips. The new position made her massive tits bounce and settle heavily, the soft flesh rippling with the movement. "Can't we make it shorter? One week is too much. That's a long time for… whatever this game is supposed to be."
Tim rubbed his chin and thought, his eyes never leaving her naked body. He let the silence stretch for several long seconds, clearly enjoying the way she stood there exposed and waiting.
"Okay," he said at last. "I'll make it less. But it depends on if you properly become a slave. You have to mean it."
Sophia let out a small, almost exasperated breath, still clinging to the idea that this was nothing more than childish nonsense. "Yeah, yeah. I'll wash your clothes or feed you food and drinks, whatever you say."
My stomach twisted tighter. Sophia was being painfully naive. She truly believed Tim would treat this like some bratty little brother's power fantasy where he is going to order harmless chores and silly orders.
She had no idea how far he intended to push her. And I… I was just as trapped. The blackmail video still loomed over me, and now the debt from the bet I had lost.
Yet even as unease churned inside me, another feeling stirred low and shameful inside me. The thought of her soft, mature body being made to obey commands, any commands, sent an unwanted spark of heat through my veins.
I imagined her following orders without question, her heavy breasts swaying, her thick thighs parting on command. The fantasy was intoxicating until I remembered it was Tim giving those orders instead of me.
Tim let out a low, boyish giggle that somehow managed to sound cruel. "If you really accept it, then let's make sure you know your place as a slave."
Sophia blinked, her brow furrowing slightly. "Hm?"
Tim's voice dropped, losing every trace of playfulness. The change was sudden and deliberate. "Call me Master."
Sophia's eyes widened, her lips parting in surprise. A deep flush spread across her cheeks and down her neck, coloring the upper slopes of her heavy breasts. "M-Master? But I'm older than you. That doesn't make any sense."
Tim's expression shifted again, his smile sharpening into something colder and more commanding. "Does it really matter? You're my slave bitch now. Call me Master."
Sophia gasped at the sudden shift in his tone. Her hands clenched into fists at her sides, the muscles in her thick thighs tensing visibly. She had already given her word in front of both of us. There was no graceful way to back out without making everything worse.
I could see the internal struggle playing across her face, the embarrassment of being spoken to like that by someone younger, mixed with the hesitated acceptance that she had walked into this herself.
"Mas… Master," she said quietly, the word barely audible. It came out shy and strained. Calling someone half her age Master clearly humiliated her, yet she forced it out anyway.
Tim's eyes gleamed with satisfaction. He wasn't satisfied with her quiet submission. "What? I didn't hear you. Say it louder. Maybe if you come closer and kneel in front of me, I'll be able to hear your more clearly"
Sophia hesitated, her heavy breasts rising and falling with quick, shallow breaths. The motion made them jiggle softly. She took a small step closer to him, her bare feet padding across the floor. Despite her flustered state, she still carried herself with a faint trace of old sister dignity, her shoulders straightened even as she lowered herself.
She glanced back at me one last time before slowly sinking to her knees in front of him. Her thick thighs spread slightly as she settled onto her heels, her round ass resting against them.
Her massive breasts hung heavily in front of her, swaying and jiggling with the movement before settling into a deep, pendulous hang. She bowed her head slightly, staring at the ground, and spoke again, louder this time, her voice clear but still edged with embarrassment.
"Master… from now on, I'm your slave. I'll obey whatever you command of me."
Tim smiled slowly, the expression of pure victory. Without breaking eye contact with her, he reached down and unzipped his pants. The sound of the zipper seemed loud in the quiet room. He pushed both his pants and underwear down in one motion, letting them pool around his ankles before kicking them carelessly aside.
His cock sprang free, already half-hard and hanging heavily between his legs. It was much larger and thicker than I would have expected from someone his age. The shaft was veined and flushed, the head dark and swollen, already beginning to stiffen further under Sophia's stunned gaze. It looked heavy, the weight of it making it bob slightly as he shifted his body.
Both Sophia and I stared with our eyes wide. She pulled back a fraction, her lips parting in genuine surprise as she took in the sight of it so close to her face. Her heavy breasts heaved with a sharp intake of breath, the soft globes swaying and jiggling from the sudden movement.
Tim kicked his pants away and looked down at her, his voice low and unmistakably commanding. "I'm too pent up right now. As a slave… satisfy me."
To be continued...
* * * * *
Read 100+ Chapters at Patreon:
Patreon: FloppyGeneral
Patreon.com/FloppyGeneral