Proves it

The captive cowgirl stared at Usher's vile phallus in stunned disbelief. It throbbed slowly, growing thicker before her eyes as she took in every bump and vein, the fat length of his shaft filthy with the dried remnants of his cum, her own juices and what appeared to be blood - her blood most likely, she realised in disgust.

He smelled of days old sweat, stale semen and rotten vegetables and as her eyes travelled up his shaft she saw the horrid nest of wiry grey hair from which his putrid trunk sprouted. She gagged, the reflex causing her meagre breakfast to rise in her throat but somehow she managed to **** it back down.

Usher looked down at her from above his disgusting member, his leering grin widening as his captive closed her eyes tight, then parted her lips, submitting herself to his demand. "Ere... this'll make it easier." he said as he poured the rest of the cup's contents into her mouth before tossing it aside and stepping forward.

Usher reached down and cupped Lisa's cheek in one of his huge, grubby hands, stroking her gently as he guided the tip of his cock to her lips. Despite her dishevelled state, her hair felt soft and smooth, the sensation causing him to stiffen to full mast as he pushed his foul tip past the cowgirl's lips and into the soft, warm recesses of her mouth.

Lisa made a muffled sound of protest but did her best to accommodate her captor, having to open wide for him. She tried desperately to minimise contact between her lips and his rancid meat, but his girth made her efforts futile, her wet lips quickly building up a lather of slimy muck as the grime coating him became slick and wet once more. The taste of him was worse than she had imagined, the foul saltiness, the sharp tang of old piss, and his diabolical body odour mingled on her tongue, making it impossible to show the slightest shred of enthusiasm for her task. She was almost grateful when Usher began to buck his hips slightly, sliding his length in and out of her rhythmically, without her having to do the work - hopefully he would finish quickly.

Usher continued to stroke Lisa's cheek as he watched his cock disappear between her lips again and again, her softness intoxicating. Damn she was a looker too... he couldn't remember the last time he had enjoyed something so lovely without having to pay. Convincing her not to tear out his throat once he set her free though... that would be tough.

Usher was snapped out of his train of thought as the the cowgirl coughed and spluttered beneath him. He had pushed a little too far, the fat tip of his cock pressing against the back of her throat. He was pleased to note she didn't try to spit him out or stop the soft sucking she was applying however, and in fact, he realised with an approving grunt, her tongue had started to lap tenderly at the underside of his shaft, causing him to throb ominously.

Lisa had managed to shut herself off, for the most part, compartmentalising the vile act she was performing from her conscious thoughts as much as possible. Perhaps due to this she had begun to slip into previously learned behaviours without realising, her lips wrapping gently around Usher's thick shaft as her tongue lovingly licked at him. This wasn't her first blowjob. In fact, she had quite enjoyed the few she had given in the past, the thrill of feeling a man throb and twitch against her tongue something she relished at the time. She didn't even mind the tingly splash of cum that followed, the creamy texture filling her with a wicked sense of decadent pride.

It was with these thoughts floating through her mind that she felt the fat cock in her mouth twitch, then spew a massive load of thick, creamy cum over her tongue. Usher growled in pleasure as he watched the cowgirl gulp his load down, jets of his cum filling her mouth forcing her to swallow several times. "Good girlie..." Usher grunted, his words snapping Lisa back to the present. "Swallow it alllll...".

Lisa pulled away from Usher, shocked - his cock slipping from her mouth and spraying his final jets across her lips and chin. She coughed and spluttered, spitting to try to cleanse her palette but it did little given how much she had already ingested. She felt queasy as realisation hit her, her stomach, having been mostly empty to the point of starving for the last couple of days, now uncomfortably full with her revolting captor's sperm.

As Usher stepped away from her she noted that his cock was far less filthy, his now shining shaft slick with her spit. The knowledge that she had ingested so much of his foulness making her feel sick to her stomach. Still breathing heavily, Usher congratulated the cowgirl condescendingly, "Well done lass... very well done. Ya surely have some resolve in ya, to be sure. I think we can probably work somethin out after all."

With that, he left the room, probably headed to pour himself a drink, leaving Lisa to wallow in her own thoughts. Unable in her bound state to wipe the cum from her lips and chin, she was instead **** to endure the unpleasant sensation of it slowly drying into a crust, a constant reminder of her belly full of churning jizz.