Smoothly for her, bumpy for others.

Richard Wyatt had been resident at Bay Cove Central for about a year, but the last month had definitely been the most interesting - in the sense of the Chinese proverb. It wasn't that the patients in the isolation ward were unruly or anything, but some required a lot of... help. In full protective equipment to avoid infection. It didn't help that all of them were fucking hot, with no qualms about showing off. About half of them were so radically changed that things didn't quite work for Richard, but he still performed his shifts in the isolation ward with an awkward, persistent boner.

At least today, he wasn't scheduled to work down there, but instead to perform a medical checkup for a recently-not-anymore comatose patient, routine stuff for sure, not at all comparable to the craziness of the isolation ward. He'd only glanced at the file he'd gotten to prepare - coma, checkup, Samara, whatever. Been there done that.

Except not.

"Good morning, Richard Wyatt. You are 2 minutes, 37 seconds early. This unit, designation S4M-ARA, is happy to cooperate with any requests you may have pertaining to the planned checkup."

So much for a break from the craziness - at least his shifts in the isolation ward had prepared Richard for the sight before him, accepting the existence of a honest to God robot rather easily. Not that it helped with the sight of the gynoid's fully exposed tits, and Richard couldn't help but stare. Why a robot even had tits, he didn't really think about, but truth be told, his blood was debating if supplying oxygen to his brain was really the best thing to do right now. What Richard did know was that they were spectacular, round and heavy and perky despite their size, and even though they were made from light grey silicone, his fingers twitched and his shaft tingled and swelled at the thought of touching them. They were spectacular.

"This unit's mammary equivalents seem to be distracting you, Richard Wyatt. Do you require an adjustment of their size?"

"I-I, uhm, what?" Stammering, Richard looked into the gynoid's metal face, with its plump, silicone lips. It was beautiful, with a pleasant shape and blue, glowing eyes - the fact that it was made from segmented metal that moved to replicate facial expressions only made it look exotic.

"This unit's mammaries. Do you require their size to be adjusted?"

"I, oh, uh, you can do that?" Putting his file and bag with equipment on S4M-ARA's bedside table, Richard felt his cock swell further. Figured that he wouldn't get even one shift without tenting his pants. "I mean..."

"Yes, Richard Wyatt. Let me demonstrate." Before Richard's eyes, the gynoid's smooth silicone breasts began to expand, making his shaft jump in his boxers as they drooped deeper under their weight, still remaining improbably perky throughout. "This unit has not yet exhausted her supply of non-newtonian fluids. Would you like to test the limits of what this unit is capable of achieving?"

"Y-you mean...?" Richard should have said no. He was here to check a patients reflexes and general health, not ogle robot tiddies. But the sight of S4M-ARA's expanding funbags did away with his reason, his blood having decided that there were much more fun places to be than Richard's brain. "How... how big can you go?"

"According to construction specifications, this unit is capable to achieve a size equivalent to an I-cup with internal reservoirs alone. Connection of an auxiliary reservoir allows to exceed this threshold near infinitely, limited only by material fatigue." As S4M-ARA calmly explained her body's features, her tits kept expanding, already fully obscuring most of her thorax and inching down over her segmented metal tummy. "Conversely, the internal reservoir has enough capacity to decrease the size of this unit's mammary equivalents to below A-cup."

"Uh-huh, I see..." Richard replied absentmindedly - the sheer size of S4M-ARA's boobs was creating mouth-watering cleavage that only grew deeper, and the young doctor's lips twitched as he imagined himself suckling on those fat, swollen nipples. Who cared that they were made of silicone or something?! "A-and they, uh... you can feel them?"

"This unit's entire surface is studded with sensors for haptic feedback, most of which are integral for the fulfillment of this unit's primary directive."

"Your primary directive?" Richard swallowed hard. With their growth slowing, the gynoid's breasts had now reached a size he had never even seen in porn. It looked as if he'd be able to bury his entire head between them. "Wh-what's your primary directive?"

"This unit's primary directive is human-gynoid relations of a carnal nature, secondary directives include companionship, a variety of domestic tasks and a full suite of accounting capabilities."

"Wait, uhm, carnal?"

"Yes, Richard Wyatt. This unit is fully equipped for a variety of intercourse practices." S4M-ARA's voice was finely modulated to send shivers down Richard's spine, pure allure in the form of an electronically produced voice. He'd never even thought it was possible to filter sex through a vocoder, but here he was, rock-hard and breathing heavily. "Now, do you wish to proceed with the medical checkup you have come for?"

"Wha-?" The sudden shift in topic threw Richard for a loop, especially as S4M-ARA's by now improbably large boobs stopped their growth and jiggled slightly, the soft motion making his breath hitch in his throat. "I mean, yes, I, yes, that's what I'm here for!"

To be precise, that's what Richard had been sent for. What he was here for had changed now: He simply had to get his hands on these tits, professionalism be damned! Heart hammering, Richard went through his bag in the search for the one thing that was sure to get him into touch with S4M-ARA's assets - only to remember that he was wearing his stethoscope around his neck as usual. As Richard put the earpieces in and raised the business end of the stethoscope, he felt his mouth go dry, eyes glued to S4M-ARA's gargantuan chest as his cock pulsed relentlessly in his pants.

"This unit wishes to inform you that she does not possess a heartbeat or breathing, Richard Wyatt. What is your purpose with that instrument?"

"I just, uhm, listening if everything is flowing correctly? You must have all kinds of pumps and lines and everything!" If the gynoid had been living in the traditional sense, Richard would have been home free - or wrist deep in titties. Or if she'd been much more gullible. Still he wasn't going to give up that easily. "I bet if there's anything wrong inside of you, I could hear it, I tinker with my car on the weekends!"

"This unit wants to assure you that she is far more complex than a car. Further, diagnostics return green for all systems. This unit is functioning at optimal levels."

"Then why did they send me here?" Seeing his chances to touch the biggest tits he'd ever seen grow slimmer with every second, Richard decided to resort to hide behind his superiors, brandishing the head of his stethoscope. "I'm here to do a full post-coma checkup! Please just let me do my job?"

"Very well, this unit will comply as agreed with Doctor Hollands. For ease of access, adjustments will be made, of course." There seemed to be an amused undertone to S4M-ARA's synthetic voice, and Richard furrowed his brow - and then his eyes snapped wide open as the gynoid's marvelous boobs began to grow smaller by the second. "At their current size, this unit's mammary equivalents will block sounds far too much. Please stand by for redistribution of fluids."

Richard's heart sank, and he had to bite back a frustrated moan; he'd been so close, even convinced S4M-ARA to let her touch him, but the robot had to be so damn logical! And she was right, too: Putting the stethoscope to her massive tits would have him listen to bugger all, except the racing of his own heartbeat in his ears. But even with S4M-ARA's breasts shrinking from impossible to improbable to merely really big, Richard remained hard as a rock - after all, the gynoid's breasts were so far the only modular thing on an otherwise still spectacular body, smooth, segmented metal forming sensual curves, a thin waist leading to impressive hips - also made from the same silicone as her breasts - thick thighs and between them...

"Oh boy." Richard hadn't wanted to say it out loud, but from where he was standing, he could see the barest hint of S4M-ARA's silicone snatch. "Uhm, I mean, that size should be fine, S4M-ARA!"

Wishing he'd thought of this earlier, Richard looked wistfully at the robot's breasts - still the perfect shape, still fairly large and certainly larger than any he'd ever touched, but smaller even than when he'd entered the room. At least S4M-ARA promptly stopped the shrinking of her boobs, and Richard could have sworn that the hint of a teasing smirk played over her silicone lips. Was the robot messing with him?

"Okay, uhm, let's see..." With shaky breath and shaking hands, Richard brought his stethoscope to S4M-ARA's breasts, putting it on the gynoid's silicone skin and looking at her face for a reaction - he still had that much professional curiosity. He felt her boobs push harder against his palm, and at first thought the cold head of the stethoscope had prompted an intake of breath as it so often did... but robots didn't breathe! "Uh..."

S4M-ARA was staring straight ahead, expression as neutral as only a robot was capable of, but when Richard looked from back down, her tits were clearly a bit bigger than before he'd put the stethoscope on. Weren't they...? Or had he just pushed his palm down to feel the smooth and soft silicone of S4M-ARA's boob press against his hand? In any case, the sensation of the supremely soft orb under his hand made Richard's shaft throb in his pants, and he was so close to the gynoid's heavy tits. If he just angled his hips forwards a little...

"What do you hear, Richard Wyatt? Does this unit function to your satisfaction?"

Once more, S4M-ARA's vocoder snapped Richard out of the lustful swirl of his thoughts, just in time before he did something stupid. And indeed, he heard something of the gynoid's internal function - servos humming in standby, fluids sloshing, something was ticking softly... in other words, Richard had no idea what he was hearing or if it was functioning normally or not. Still, he made a show of humming and hawwing, moving his hand around to different spots just where the swell of S4M-ARA's breasts began so he could brush his palm over the marvelous orbs.

"This unit repeats her query: Is everything to your satisfaction, Richard Wyatt?"

"Oh, ah, yeah, definitely!" Feeling a drop of pre leak into his boxers, Richard swallowed hard and pulled back his stethoscope. He was indeed satisfied with the feeling of S4M-ARA's chest - they felt softer and smoother than any pair of tits he'd ever touched, and he longed to play with them to his hearts content. But alas... "Now, hm, the next step would be to test your reflexes..."

"This unit has no reflexes per sé. Reaction times are projected to be in the millisecond range. However, accessing this unit's pop culture sub folders reveals a way you should be able to test these reactions, namely a scene from a popular science fiction show in which a ball is thrown at an android. You will find that this unit is quite adept at handling balls, Richard Wyatt."

'That I believe...' Richard thought, swallowing once more as he put away his stethoscope. There was actually a small ball in his bag, usually used when taking blood sample - for the patient to squeeze, although Richard wanted S4M-ARA to squeeze another pair of balls, of course. "Alright, here you go."

With barely any warning, Richard threw the ball towards the gynoid. But S4M-ARA's servos whirred as her right arm shot up, the entire rest of her body remaining perfectly still, and the robot's metal fingers closed around the tossed ball with surprising gentleness. Bringing her hand before her face, S4M-ARA threw the ball back up and caught it with her other hand, arc so perfectly calculated that the gynoid's left hand didn't have to move beyond the opening and closing of her fingers. Another throw, this one bouncing off her forehead, then down to her breasts, where it got stuck in her cleavage.

"As you can see, Richard Wyatt," S4M-ARA said looking up at Richard with the hint of a smile - or were her lips just molded that way? - "this unit's hand-eye coordination sub-routines function to a satisfactory degree. Now, this unit requests the tests continue. After you get your ball back, Richard Wyatt."

"I... what?" Once again, Richard stared at the robot, first her impassive face, then her breasts, thrust out and presenting the ball to him. And this time, they were definitely larger than before. "O...okay. Just..."

Fingers and cock twitching, Richard pushed his hand between S4M-ARA's marvelously soft orbs from the front, drawing in a shaky breath as he felt the gynoid's curiously cold breasts press against his fingers as he moved them up nice and slow, savoring the sensation, until he closed his hand around the ball and pulled his arm back. Shaft straining against his boxers, nuts churning mightily, Richard felt his heart thunder in his ears. Of course he was being unprofessional, but who really cared?!

"Very well done, Richard Wyat. Are there further tests you require?"