Mercy sighed, gazing over the unconscious figure that laid atop the medical cot. She leaned back in her swivel chair, setting aside the clipboard and stretching out. When had she gotten so exhausted? A yawn escaped her pink lips, lazily covering it with her hand. Another long day working, and once again Pharah had come back wounded and requiring desperate medical attention. It was never anything too grave, but the number of these little incidents had slowly built up to staggering numbers of free, usually thankless, appointments and emergencies to where it was getting hard to properly enjoy it. It was her duty, but was it really okay for her to let Pharah take advantage of this selfless service of hers?

Well, not that she could do anything about it. So long as there was someone to save, she would save them, she only wished there was some form of compensation or gratitude shown deeper than a brief thanks or a mild apology. She leaned back in her seat and crossed her arms, gazing intently at the back of the sleeping figure on the plain white spread. The medical gown had flipped up slightly, the crease in the back parted at the waist to show off something that quickly drew Mercy's attention. Pharah's ass. Thick, beautifully toned cheeks on full display, all too inviting in that still, slumbering state. Mercy raised a brow as she gazed on, gentle snoring reaffirming her that Pharah was taking her usual nap after treatment in an attempt to brush off her injury.

Something began to stir inside of her. A devious thought, perhaps, the temptation of that perfectly shaped ass drawing her eyes to it in an unbreaking stare. She could feel her tights bulge, a straining at the crotch slowly surging as unethical thoughts formed in her head. Was there any harm in rubbing one out, here and now? It'd been some time since she'd had a break, no chance for any proper form of relief. She'd known that it wouldn't take more than a hair trigger to set her and her libido off, and this was certainly a bit more than that. The life of a doctor was extraordinarily busy, after all.

Before she really realized what she was doing, she'd already wriggled her tights and panties down her thighs to allow her growing hard-on to flop free. A sigh escaped her lips, spreading her legs just enough to let her sack breath a bit. Her gaze timidly moved towards the door, confirming that it was shut and locked. She'd make it fast. Her lips pursed, spitting into her hand for some makeshift lubricant before lowering her palm to the wrist-thick base of her shaft. A loose grip formed, slowly starting to tease it towards the tip. She focused her attention on the toned, heart-shaped ass of her client, those wonderfully pillowy-looking mounds unknowingly offered up to her in such a time of lusting need. Mercy's teeth dug into her lower lip, stifling a groan as her prick surged to full-mast, an impressive nine inches pulsating eagerly in her palm.

Several solid minutes of uninterrupted stroking ensued, but to her disdain Pharah inevitably rolled forward. Onto her front, depriving her of the view she'd been ogling so lecherously without any notice. A sigh escaped Mercy's lips, not particularly pleased by this occurrence. Her stroking paused, but her mind kept thinking and pondering. Depraved thoughts of getting more intimate arose. After all, Pharah owed her, right? She rose to her feet without knowing what she was going to do, her hand still gliding along the saliva-slick shaft, her heels clicking against the tiled floor as she approached the bedside. She stood towering over Phara's slumbering figure, gazing down intently once more at those round, plump mounds. A soft groan escaped her lips. Maybe Pharah wouldn't even wake up? She knew that the girl was a heavy sleeper.

Despite better judgement, Mercy resolved to take things a step beyond unethical. In her free hand she grabbed a bottle of oils off of the shelf, used traditionally for massaging sore body parts in order to relieve pain fast, and cautiously climbed onto the cot. Slowly she made her way to straddling the prone girl. Her cock smacked across those round cheeks, gently sitting back on Pharah's thighs. The cork of the bottle came undone, carefully tipped over to pour out the shiny fluid over those heavenly mounds and backside of her pale shaft. She made sure to let it flow evenly over each, using her other hand to massage and knead those supple orbs with a delicate touch. Once each was suitable shined up and, frankly, impossible to resist violently fucking at this point, she practically tossed the bottle back onto the shelf and took her girth in hand once more. Slow, thorough strokes spread the fluid as a lubricant, getting herself nice and prepped to penetrate the pucker of the unaware patient.

Her hips began to move on their own, grasping herself steadily by the hilt and stroking her shaft between the cleft of that bubble butt. She would linger here for a moment, enjoying the sensation of that slippery, soft flesh gently embracing the sides of her length. The tip poked out across the small of Pharah's back, Mercy's heart pounding with infatuation at the sight of her shaft sandwiched between those bronze mounds beneath her pale prick. She licked her hips like a predator, something having come over her that she wasn't entirely familiar with. It felt good, though. She was taking control and finally earning her recompense for countless hours worked for this idiot, albeit a lovable one. Her pelvis drew back, aligning the tip with the unsuspecting asshole of her client with the careful guidance of her firm grip. Mercy raised herself, intertwining her legs around Pharah's hips to keep them locked into place, leaning over the patient's back and assuming a proper mounting position. No turning back now, she was going to breed the girl's asshole no matter the consequences. She desperately needed this release, her heart practically pounding out of her chest as she slowly pushed forward.

The tip pushed past that pucker with a soft, satisfying squelch. Already, even in an utterly relaxed state, Pharah was tight. Far too tight for her girth to comfortably penetrate, but that only deepened the motivation to press forward. Mercy leaned forward, pressing herself against Pharah's back, her arms loosely wrapping around the woman's torso as she invited herself deeper into the embrace of that rim. A soft sigh escaped her lips, one of relief, her breathing hot in Pharah's ear. The thrusting began, slowly working herself in and out, her balls swaying as she worked herself inch by inch with the aid of lubrication. She could feel an instinctual clenching, Pharah starting to rouse from her sleep. She could feel a tightening below, the patient's own cock starting to grow hard from the gentle teasing and grinding against her prostate.

"Good morning," Mercy softly whispered into Pharah's ear, dipping her head in and nibbling on the client's earlobe. She was prepared to go all in, and was ready to accept the consequences. She needed this far too badly to pull out now. Release, with the aid of another's tight hole, a suitable exchange for her free medical services in her mind. Pharah, still groggy, opened her eyes at least.

"Mmh... Moorn-- What's... Going on back there?" Pharah grumbled, reaching up to rub her aching head. Mercy couldn't suppress her grin, planting a soft kiss on Pharah's neck. She thrusted a bit harder, making those cheeks wobble beneath her jerking motions, already buried halfway to the hilt of her throbbing length.

"Checking your temperature, just stay nice and relaxed for me, okay?" Mercy teased softly, though it was seemingly lost on the perplexed patient. No matter, she continued to hump away, moving one hand up the gown and finding one of Pharah's breasts underneath. She gave it a squeeze, taking the firm, perky orb in palm and letting her oiled hand tenderly squeeze the supple flesh.

"Wh-what are you...?! Hahh...!" Pharah let out a moan, slowly catching on to the thick, throbbing length thrusting away at the snug grip of her asshole. She was still too weak to put up a fight, light squirming was effortless for Mercy to overpower from this position.

"Just think of it was a way to repay your debts to me, hm?" Mercy chuckled softly, keeping her words soothing. A usual doctor trick to keep the injured calm. Panicking was no good, after all. Pharah could only groan in response, reaching down to take hold of Mercy by the wrists in a feeble attempt to pry away. Mercy abruptly slammed her hips forward, shoving her cock to the hilt inside that oiled asshole, before moving her lips to gently bite down on Pharah's neck. A playful assertion of her dominance. "No, no, no moving," she scolded in a reassuring voice. "It'll be over soon, you - nng - just lay there and let me finish up." A firm command in a tone that was far from threatening left Pharah visibly confused, especially with the generous amount of sticky pre-cum gushing from the tip of her shaft onto the sheets.

"You - gahh! - can't... Just... Ohfuck," Pharah couldn't stop her moans from betraying her own gradually rising lust, Mercy's forceful motions mercilessly massaging her prostate with each downward buck. The doctor's pelvis slapped into her oiled cheeks relentlessly, making the flesh ripple and bounce with audible claps, Pharah able to feel those heavy orbs smacking off of her thighs from above. It was relentless, Mercy starting to move with the tireless drive of a ravenous predator. All sense of gentle care had been discarded in a moment's notice, Mercy starting to furiously move and slam away at that clenched pucker with greed and a deep-seated lust to be fulfilled. In all honesty, Mercy had been craving to do this since day one, Pharah far too attractive of a client to not perversely gaze upon with an unprofessional eye anytime she had the chance. There was no way she wasn't going to take out all of that built-up aggression in one blow, and her desire to blow that load was rapidly building. Her breathing grew labored, inhaling and exhaling through gritted teeth, her chest heaving and sweat beading down her brow. She was putting one-hundred-and-ten percent into this, and Pharah's brain was slowly being turned to mush as a result.

It wasn't soon after that Mercy's lips latched onto Pharah's neck once more and let loose a holler of bliss. Her thrusts continued without skipping a beat, but a hot stream of seed began to pour out. Ropes of pearly spunk emptied into the waiting cavern she'd so violently claimed and attempted to conquest, her length swelling and jerking with each new ounce discharged inside. Pharah's eyes rolled back, her own moans increasingly audible in a showcase of her fading resistance. All desire to fight seemed to fade from her with her anal creampie, and Mercy intended to take full advantage. Her thrusts slowed to a halt, moving her hands to clutch Pharah by the hips and raising the both of them up to a more upright position on their knees. It was awkward, especially while she remained seated deep in the girth-gripping anal cavity of the client, but this position allowed her to wrap one hand around and to take Pharah's dark-toned cock in her palm.

"Just one final thing and we're done with the exam, okay?" Mercy boldly taunted, starting to swiftly jerk Pharah's cock with a tight grip. Pharah's tongue lolled out, wordlessly and breathlessly nodding from this new source of stimulation. It hardly took more than just Mercy's touch for her to blow her own load, shooting out a generous quantity of jizz onto the stained, white sheets below, ropes of the stuff shamefully shooting out with each new stroke of her sticky shaft. Mercy made sure to continue pumping until the very last drop had been wrung out, at which point she slowly drew back her hips and withdrew from their lewd embrace.

"Good!" She praised. "I'd say you've made a full recovery!"