Stolen Glimpse

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All persons are fictitious and are over the age of 18
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Afternoon silence shatters with a moan,
A woman's voice, raw and intense.
I creep down halls I've since childhood known,
My heart pounds hard, my breathing dense.
The sight I see makes my jaw drop like stone.

The door's ajar, a sliver of light,
Reveals the source of those urgent sounds.
My pulse quickens, palms sweat with fright,
As curiosity keeps me spellbound.
I edge closer, careful and contrite.

Upon the sofa, sprawled out carelessly,
Her skin exposed, just underwear remains.
Her hand moves fast, rhythmic and free,
As fingers probe deep, seeking pleasure's gains.

Her eyes shut tight, lost in sensation,
Unaware of my presence so near.
I'm frozen, caught in fascination,
Unable to move, unable to cry,
As I witness this private elation.

A buzzing sound, a vibration's thrill,
A phallic device, her desire to fulfil.
She guides it in, her pleasure to attain,
Her body trembling, writhing in sweet strain.

'Take me, fuck me,' she whispers in her plea,
A longing uttered, a fantasy set free.
I wonder who she yearns for in her mind,
A face perhaps I'd recognize, I find,
As she edges closer to her climax, refined.

Her back arches, toes curl with strain,
Every muscle taut, seeking release.
I'm trapped between shame and attention,
Knowing I should leave, grant her peace,
Yet rooted here in rapt suspension.

In silence, I stand, transfixed by her display,
Unable to resist this primal ballet.
'Oh my,' she cries, a passion's fevered call,
'FUCK, I'M CUMMING!' her body tense and arched.

Her body convulses, a shuddering delight,
Her muscles clench and quiver, skin flushed bright.
Panting and gasping, she recovers her grace,
Her features, somehow familiar in this place,
Her chest heaves, sweat glistens on her face.

Reality crashes, harsh and cold,
As recognition finally strikes.
My mind reels, thoughts turning dark,
This secret knowledge forever spawns
A guilt that leaves its lasting mark.

I slip away unseen, this secret mine,
My sister's pleasure, sealed in time's design.
Her moans still echo, haunting every room,
Creaking boards announce my hasty flight,
Her startled gasp confirms my plight.