You grow tired

After the intense session on the cushion, where Amy's body had clenched around my thrusts and Lila had eagerly lapped up every overflow of my release, I felt the weight of the day settling in. The room still hummed with their soft breaths, the air thick with the scent of sweat and sex. I wiped a hand across my brow, deciding it was time to retire. 'Enough for now,' I said, my voice carrying the finality of command. 'Amy, you're with me. Lila, follow.'

Amy rose gracefully, her skin flushed and marked from our play, while Lila scrambled to her feet, eyes downcast but alert. We made our way through the dimly lit corridors to my chambers, the stone floors cool underfoot. Amy walked at my side, her naked form a familiar comfort, while Lila trailed a step behind, her uncertainty palpable.

Once inside the opulent room—dominated by a massive bed draped in dark silks and the faint glow of lanterns—I shut the door with a decisive click. 'Fetch the glass box, Amy,' I ordered, gesturing toward the shadowed corner. Amy nodded eagerly, her pierced nipples swaying as she crossed to a concealed cabinet. She dragged out the transparent enclosure, its reinforced sides gleaming under the light, about the size of a large crate but designed for confinement, with a locked lid and minimal padding on the floor.

Lila's eyes widened, flicking between the box and me, confusion etching her features. She hadn't encountered this particular tool of discipline before, but her training held; she didn't question aloud. 'Kneel for inspection,' I commanded her, pointing to the center of the rug. Lila dropped immediately, spreading her knees wide to expose her slick cunt, the lips still swollen from earlier attentions. She laced her fingers behind her head, thrusting her chest forward, her posture perfect in submission.

I circled behind Amy, my hands roaming her curves possessively. Fingers trailed down her spine, then cupped one firm tit, pinching the nipple ring until she gasped softly. My other hand dipped between her thighs, parting those prominent pussy lips to stroke the wetness there. She leaned back into me, a quiet whimper escaping. Leaning close, my breath hot against her ear, I murmured, 'You've been such a good **** today, Amy. As your reward, you'll select the toys for Lila and fit them yourself. Then she'll squat in that box all night, watching me take you properly. No release for her, just the ache.'

Amy's cunt clenched around my probing fingers, her arousal soaking my hand. She nodded vigorously, a sly smile curving her lips. 'Yes, Master. I'll make it tight for her.'

Turning to the array of implements on the wall, Amy selected with deliberate care: a thick anal plug, ridged and unyielding; a vibrating egg for her pussy, remote-controlled; a hefty dildo, veined and broad, meant to **** her squat; and finally, a **** collar, leather with a metal ring that would tighten on movement. She approached Lila, who remained still, her exposed slit glistening in anticipation—or dread.

'Open wider,' Amy instructed, her voice laced with authority borrowed from me. Lila complied, thighs trembling as Amy knelt and pressed the lubed plug against her asshole. With a firm push, it breached the tight ring, sinking in inch by inch until the base nestled flush. Lila bit her lip, a muffled groan escaping. Next came the egg, slid deep into her pussy with a wet squelch, the cord dangling for later retrieval. Amy flicked it on low, watching Lila's hips jerk involuntarily.

The dildo was last for insertion, but Amy positioned it upright in the box's base first, securing it with straps. 'You'll ride this all night,' she said, guiding Lila to straddle it. Lila lowered slowly, the thick head parting her folds before she impaled herself, the stretch drawing a sharp cry. Finally, Amy buckled the collar around Lila's neck, adjusting it so any shift would constrict her throat just enough to remind her of her place.

I savored the sight as Amy maneuvered Lila into the glass confines. The submissive girl squatted awkwardly over the dildo, knees bent at an punishing angle, the plug and vibe keeping her filled and buzzing. Amy locked the lid with a satisfying snap, the transparency ensuring Lila had a front-row view of the bed. Already, her muscles quivered from the strain, eyes locked on us through the glass, a mix of longing and frustration in her gaze.

Satisfied, Amy turned to me, sinking to her knees with fluid grace. Her high ponytail swayed as she looked up, mouth parting invitingly. She leaned in, tongue flicking out to trace the underside of my cock, still semi-hard from earlier. Slowly, she engulfed the head, lips sealing tight as she sucked with languid pulls, her hands resting on my thighs. Her tongue swirled around the shaft, tasting the remnants of our play, while her eyes stayed fixed on mine, seeking approval.

I tangled fingers in her hair, guiding her deeper, the warmth of her mouth enveloping me fully. She bobbed steadily, cheeks hollowing with each descent, saliva trailing down her chin. The vibe's hum from the box provided a distant underscore to her slurps, Lila's muffled whimpers adding to the symphony. Amy's free hand slipped between her own legs, rubbing her clit as she worked me, building her own heat while denying Lila's.

As Amy's pace quickened, taking me to the back of her throat with practiced ease, I glanced at the box. Lila shifted minutely, the collar biting, the dildo grinding deeper into her. Perfect. This was just the beginning of her endurance training for the party ahead.