Liz- Female anthro fox. Red and brown fur, brown eyes. 

Finally, a night alone. Her dog walking job had provided plenty of materials, and her roommate was headed back to home for the weekend. Liz hadn’t had time to herself to indulge her favorite fetish in a long time. She stood in her room, admiring herself in the mirror. Her stomach hanging out over damp, threadbare, and once white panties. She winced as she prodded the hard mass in her guts, the intentional diet keeping her stopped up all week, just for tonight. Anticipation and excitement flooding her loins with arousal that only slightly overpowered the discomfort. 
Hand moving up to caress her modest breasts, fingers circling offcolor areola and pinching pert nipples. Squeezing her breast and biting her lip, her other hand pressing against her moist sticky groin. She smiles at herself before dropping her hands to her side and taking deep breath. Seeming to decide its time. She turns, grabbing an insulated bag and canine dildo then proceeding towards the bathroom.
Staring at the pristine tub she was about to defile, her mind whirling through long planned scenarios trying to settle on how to start. She frowned, hefting the bag in one hand, the solid weight of its contents balancing against her own thoughts. 
As she bent down to put in the drain plug a sudden cramp reminds her of bodily needs. Stepping quickly into the tub, the bag left out for now, wishing to start with her own fresh mess. Laying down on the white linoleum, hefting her legs over her head and relaxing her bladder. Panties dampening further as she pissed herself, urine filtering through threadbare material to drip down into her open maw. Salty, yellow liquid dripping on her extended tongue, flowing down her stomach and over her breasts. 
The first taste of filth sending a jolt of excitement up her spine, gripping her mind with fresh arousal and excitement. Swallowing prematurely, droplets of piss raining down into her nose, the salty liquid stinging her nostrils. Sneezing out the irritant, a web of snot coating her muzzle, she rolls to sit, sneezing again into her hand in reflex. Her bladder deflating as the last of her urine seeps out between her legs, wetting the fur of her thighs and ankles as it heads for the stopped drain. 
She spreads her hand, peering at the sticky greenish mucus webbed between her fingers. Other hand massaging her drenched panties into her needy cunt. Wiping the snot covered hand into the fur of her piss wet breast. Sticky mucus clinging to hard nipple, stretching from sensitive flesh to searching digits. Smearing, slicking, webbing through fur and flesh. Her thoughts whirling with arousal and need, more filth, more defilement, just more.
Fingers pressing damp fabric into moist slick tunnel, grinding her clit against her palm. Licking and sucking piss and snot from long thin fingers. Panting as orgasm builds within her, each hump and grind pushing it towards a new level. Moaning loudly as it reaches a zenith, exploding up her spine, orgasm wrapping her mind. Panting as waves of pleasure crash over her, muscles loosening post orgasm. She farts, long and loud.
*PfffraaaaaatttttttttttttT*
Hot wind filtering through curly fur and damp fabric from under her tail. Vibrating against the hard tub and filling the air with the stench of long held shit. Her discomfort lessening as the gas escapes her taught pink tailhole. Sniffing, snuffing, filling her lungs with her own stench. Pushing on her guts again, forcing another blast of intestional stink from between fluffy cheeks. Hands digging under her tail and into her crotch, pressing damp salty cloth against needy orifices.
*Braaaaatttttt* 
Warm gas passing through seeking digits, piss wet fabric clinging to damp cunt. The once white panties outlining every fold and bump of her leaking vag. She leans back against the wall, forcing herself to relax, tailhole tenting against worming digits. Panting needfully, alternating between relaxing and pushing, bubbles of gas seeping from pursed starfish.
*Pffffffttttttt*
Anticipation, need, lust, excitement, mind whirling through emotions as her intestines stubbornly cling onto its load. Fingertip slipping between fabric and flesh, pressing against gasping shithole. Slipping up her taint, getting coated with vaginal slime, then sliding back towards pursed shitring. Holding it there as it almost unconsciously flexes against the probing finger tip. 
She takes a deep breath then presses home. Moaning as her slick finger sinks up to the second knuckle in her impacted guts. Feeling the hard, rounded tip of her own waste pressing against the seeking digit. Worming her finger around inside herself, the dense tube of knobby shit hot and slick against her digit. Her other hand alternating between massaging her breasts and wiping up droplets of salty piss for her to huff. 
She stiffens her body as she pushes, the torpedo of shit moving against her fingertip, slowly imbedding it inside the dense tube. Hot hard waste engulfing the probing digit as it eeks towards the exit with each passing second. 
Pulling her finger from her dark starfish, taking a second to inspect the brown smears coating the tip before shoving it into her mouth. Sucking the filth from her pads and beneath her fingernail. Tailhole gasping in the sudden absence of the intruder. Swirling her tongue through shit tainted saliva, coating her tastebuds in faintly sweet filth and swallowing down the mixture. Cunt oozing slime in excitement as she pushes on her guts. 
Feeling her tailhole pushed open by the blunt tip of the exiting log of filth, a shudder of pleasure running up her body. Coming up to her feet, hunching over as it slowly bulges out the back of her panties. Feeling the hard mass press against her palm through filthy fabric. Moaning as her asshole stretches to accommodate the exiting torpedo of filth. Guiding it with gentle pushes and nudges, herding it forward towards her gusset, sliming its way along her taint. The brown knobby snake of waste inching its way from her shithole forward towards her dripping cunt. Dividing her bulging mons as it plows forward, its legnth smearing filth onto labia, rounded tip coming to a stop against her erect clit.
She pinches off the loaf in her panties, panting heavily in excitement. Standing, and delicately removing her panties to preserve the long hard rod of shit. Admiring her trophy she takes a deep sniff of the pungent odor, her mouth filling with saliva in anticipation. She licks her lips and swallows as she lowers her head towards the turd cradled in her hands. Tongue edging out slowly, then pressing against strangely sweet log of waste. Coating her tastebuds with the taste of her own filth as she drags it up her filthy trophy.
Stomach groaning as it reminds her of more yet to come. Squatting back down she cradles her shit, pointing it towards her dripping quim. Excitement flashing in her eyes as is brings it closer to her most intimate of places. Slowly dragging the rounded tip around her oozing cunt, drawing a brown spiral on the flesh, circling closer and closer, crossing the crevasse of her needy peach. 
Her stomach cramps again, but she shushes it with a bit of will, damping her bodily needs in pursuit of her lusts. She runs the turd between her labia, slick, slimy vaginal secretions coating the outside. Melting its surface, brown tinged slime forming on the tube as the two mix. She sighs, closing her eyes and relaxing her sphincter in the same time as she presses it home. Swiftly inserting her waste into her cunt as a long coil of soft, stinking shit jets from her asshole onto the floor of the tub. 
She gasps at the penetration, rocking back on her heels to sit down into the sticky pile beneath her. Feeling the warm slimy scat squish out from under her, she begins to fuck herself with the knobby turd. Her other hand scooping up a palmful of the creamy waste smeared below her. Holding it above her face, watching it roll and slide from her palm for a moment. She licks a finger, closing her eyes to let the flavor of her guts overwhelm her tastebuds, slip between her teeth and melt in her drool before swallowing. Her eyes shoot open, and she jams the finger into her mouth, sucking it clean, then another, and another. Licking and sucking her own filth from her hand, then back for another handful, this one smeared onto her breast. Panting, moaning, coating herself with waste, inside and out, fucking herself with shit. 
Her second orgasm hits, squirting brown tainted fem cum on the other wall of the tub. The knobby tube of waste reduced by slimy cunt juice to nothing more than a soft shadow of its former glory, no longer than a finger. She lays there, post orgasmic bliss crashing up her body like waves on the beach. 
Slowly, she sits back up her night not yet done. Reaching over the edge to grab the insulated bag and canine dildo. Sucking her fingers clean before pulling the zipper open and dumping the contents onto herself. Pouring a collection of lukewarm dog turds onto herself. The black and brown lumps bouncing off her stomach varying in size and shades of brown. The stinking lumps tumbling off her chest, rolling down her fur, collecting alongside her seated form. 
She grabs the rubber canine cock, running its pointed tip through the brown slime drying outside her cunt. Coating it in her slick juices and filth, she holds it up to her nose, sniffing her own arousal and waste. Then licking it from the red colored dog rocket, sucking the slime between her teeth. Swallowing her tainted cunt juices, moaning as she feels it slip down her throat and gasping as it enters her stomach.
Lust, pure lust filling her features as she focuses back on the tip of the dog cock. Her eyes crossing onto the forming droplet of slime hanging from its tip. Her tongue pressed out from held open maw, waiting, anxiously for the droplet to fall. It splashes onto the outstretched pink muscle, again coating her tastebuds in filth.
Lowering the dildo between her legs, she scoops up more waste onto the rubber phallus. Rolling the shaft in her own creamy shit, lubing it with scat. Holding it up to inspect her work, the red rubber dick turned brown. She grabs one of the larger dog turds, placing it gently onto her tongue as she lowers the dildo back down towards her leaking snatch. Sucking on the rich canine crap, tasting the gritty salty flavor of used kibble. Rubbing her clit with the large soft silicone dog cock. Her other hand stirring and collecting the mixture of waste.
Smearing it onto her cheeks, down her neck, over her breasts. Pulling the cock away to stuff a fistful into her lusty cunt, then cramming it in with the dildo. She bites into the turd she had been rolling around on her tongue, exploding the nugget of shit across her maw. Fucking herself with the knotty filth smeared dog cock. Painting her body again with even more filth as she works towards another orgasm. 
The stink filling the room, sweat, sex, shit mixing and combining into new lurid scents. Warping through her nose, wrapping her brain, clouding her thoughts as new heights of depravity were climbed. Packing her womb with shit, a film of brown foam coating the knot as it begs entrance to her needful quim.
Feeling it build and build, painting and fucking herself with shit and fervor. Sickening squelches as slimy scat squeezes from around the knot pressing into her cunt. The herself and the tub painted in shades of brown as she writhes and pants in its depths. 
The knot sinks in with a slurping finality as her orgasm finally hits, her body wracking in ecstasy. This, this is what she needed, what she wanted. To be one with the filth in the tub, inside and out. Her pussy grasping and pulsing around the embedded cock. Slick, brownish slime leaking out around it with each pump of her heart.
Her roommate walks in, phone up to her ear, “Yeah, I forgot my charger…” She looks quickly around the room, “I’ll call you back.” She smiles at Liz in the tub, hanging up and quickly taking a picture of the frozen fox. “Don’t try to explain.” She held up one hand to shush Liz, “look I have to shit and I didn’t want to do it on the road… you know what those rest stops are like.” She quickly pulls her panties down from under her short skirt, aiming her ass towards the already filthy fox. Tail raised, pursed pink starfish winking between fluffy curls as he bladder releases. 
Liz stares stunned as her roommate hovers over the edge of the tub, her eyes drawn to the waterfall of piss spattering against the edge. She licks her lips, eyes flicking back up towards her clenching tailhole as a puff of hot gas adds to the stench of the room, then another, and finally a long coil of sloppy brown shit cascades into the tub from between her perky ass cheeks.
Hot slippery shit coiling onto her hip, fresh from her roommates sexy ass. Lizes mind whirling at the sudden happenings. Arousal and confusion warring for dominance as the other vixen used her as a toilet. Her attention turning up to catch Beth’s twinkling eyes, seemingly amused by the confusion written on Liz’s face. 
Beth blows a kiss as her bowel movement comes to an end, wiggling her hips then standing. She turns to grab some toilet paper, running it between her cheeks and tossing it into the bowl. Speaking again as she pulls up her panties, “We can talk about this later… I really must go.” She leans down and kisses Liz on the filthy nose, taking a moment to lick some of the whipped shit from the tip and swallow it down. “Mmmm. Ta.” Waving as she grabs her phone and exits. 
Liz lets out the breath she didn’t know she was holding, slipping down further into the tub. Her hands running through the fresh hot scat. Mentally shrugging, its too late now might as well enjoy it, she begins to masturbate again. With a new coat of olive brown to smear onto and into her body.