**Just to be clear, this isn't something that happened, some small things are inspired by reality, but basically, this is just the current deepest, most sexually/cerebrally satisfying version of my fantasy.**
I decide to accompany my girlfriend to her Ob/gyn appointment. Go the through the normal sign in, wait, get called back, wait for the doctor. The doctor walks in, confident and smiling while asking questions and keeping the mood light. We weren't sure who would be seeing her today, and it's the oldest Gynecologist at the practice. Possibly 65-75 years old. He's slightly above average height, large with a little extra body weight and completely gray hair. His face is unnattractive, except for sharp blue eyes under solid gray eyebrows. -His extra weight shows in his face and under his chin. He has blue eyes and silver-rimmed bifocal glasses. My girlfriend is much younger. In her 20's, a thin brunette with pale skin and blue eyes, with firm B cup breasts, which have of course been thoroughly and routinely examined my every doctor in the practice, due to the unusual cleft at the tip of her nipples. Several times her appointments have been drawn out as every doctor in the building while she's there comes in and begins pinching, pulling, rolling, and spreading her unusual pink nipples between his fingers, sometimes forgetting the person attached as they talk and attempt to stimulate her nipples to firmness. For convenience, she has on occasion forgone a bra at all for appointments, wearing a form fitting shirt instead. The oldest doctor, but only the oldest, will occasionally complete her breast exam while her shirt is on when he notices she is bra-less. She's about 5'6" and 120 lbs. After he finishes with the questionnaire, he snaps on a pair of white gloves and pulls the plastic platform out from under the cusion of the exam table. He takes his hand and touches my girlfriend's knee, and she responds by placing her feet on the platform and quickly spreading her legs open. The doctor looks under the draping, then quickly and confidently inserts his fingers completely into her vagina. Her facial expression changes to a more serious, emotionless look, a sharp contrast to the smiling and personable demeanor of just a few seconds ago. He methodically moves his fingers throughout the inside of her. Her eyes seem to look unfocused on anything, only slightly gazing toward the doctor as she turns her head to the side. He withdraws his fingers and removes his gloves. "It feels like you're in good shape." My girlfriend responds with a short, breathless "Thank you, doctor." The doctor washes his hands, and to our surprise, re-gloves them with a hard snap. He begins thoroughly lubricating his right glove as we watch silently, having expected this portion of the exam to be over. He walks back and positions himself between the stirrups. "I need to do a more in-depth exam." He lifts the sheet from her breasts, exposing everything from the base of her perky nipples down. He looks at her nipples for a few moments and then meets eyes with her. He leans in and takes each nipple in hand, going through the well established routine all at once. When finished he gives her left nipple a tug, pulling it until it won't go further, then examining the entire surface of the breast with his right hand as he holds it stretched out. He lets go, and he repeats the process on the right breast. He then pulls both nipples up and out in a wide circular motion apparently testing the elasticity of her breasts. He does this for about two minutes, rolling her nipples during the last few rotations. "Sit up." She she props herself up, hands beside her and feet in the stirrups. The doctor leans in and begins sucking my girlfriend's left breast. She gasps, her eyes roll back and she sighs as she feels his tongue manipulating and tasting her nipple. His gray stubble tickles the skin of her firm breast. She glances over at me as he sucks her. She lets out a long, gentle moan. For the next 5 minutes, he licks and tastes her bare nipple. When he's finished sucking her, he pulls the stirrups out and places her feet in them with his left hand. He open his left hand, presses it firmly under and against her right buttock, and with a gentle squeeze, controls her movement to the edge of the table, placing her just right, pulling her forward and pushing the platform back in. Her vagina is completely exposed to him, wet, from the lube he used earlier, combined with her own vaginal fluids. In a quick downward motion from her clitoris to the base of her vaginal opening, a motion that causes a quick and very obvious vaginal spasm, he inserts three fingers as far as they will go and holds them still for four straight minutes, moving them only slightly while watching the clock and occasionally looking at her face. Keeping his fingers firmly inside her vagina, he adjusts the stirrups to open her legs wider. He slowly starts withdrawing his fingers, only to quickly push them back in before they were completely out of her. She reacts with a gasp, as she lifts her head to look at his face and look down at his hand, just in time to watch him slowly and firmly push his entire hand into her open vagina. As soon as he reaches the bottom of her vagina and his fingers meet her cervix, she throws her head back, moans the loudest she's ever moaned and arches her back, pushing her body up and rotating her pelvis, allowing more of his arm to enter her. He slowly closes his hand. The drape slides off her body onto the floor. The doctor begins to thrust his hand in and out of my girlfriend's vagina as she moans between catching her breath. This continues for 30 minutes. After a final fast burst of in and out pulses, culminating in a room-shaking moan from my girlfriend. The doctor then gently removes his hand from her, taking a few moments to rub her excited and engorged clitoris. Her vagina pulses fluids onto the table. He steps away from the table, unzips his pants and removes them completely. His cock is completely erect, circumcised, about 7 inches long, and unbelievably thick with a large, smooth, purple glans. He positions himself between her legs. She looks down at his cock, breathing more rapidly the closer he comes. She can't believe what is about to happen. She's nearly hyperventilating as he guides his cock into her, slowly. She breathes out heavily as her labia seem to envelop and suck his thick, smooth crown into her until it disappears inside her along with the rest of his experienced manhood. As I watch I know there is no questioning his complete dominance over her, as she opens like a flower to accept every inch of him, being stretched to the limit of her inexperienced young vagina. I can't help but admire her willingness to meet the challenge, as I watch her take the thickest cock of her life, not willing to stop, not wanting to stop the whole body surrendering orgasm from being filled by her Gynecologist's cock. She takes him inside her, feeling every millimeter of his bare dick dominantly penetrating her soft, pale, shaved vagina... She's stretched wide, with her labia accomodating him, glistening wet on either side of his thick cock, gripping him with every available inch of her taken up and filled by his rock hard dick. He fills my girlfriend so completely that her clit is pressed against the top of his shaft. They lock eyes as they both realize their throbbing, bare, naked, wet genitals feel amazing together. The tension of the taboo fills the room. They breathe it in... tasting the pure, raw pleasure in such a forbidden act. An old, unattractive, overweight male Gynecologist fucking his attractive young female patient right in his office... both of them loving every wonderful second. They both lean forward to exchange a deep, passionate kiss. She lies back on the table, writhing, submitting completely to him, as she moans and calls out, "Fuck me, doctor." From my seat I can see from the split in the back of his white lab coat, every one of his bare assed, powerful thrusts... Throwing professionalism to the wind to submit to what they've both secretly wanted for so long. He continues, making her feel more full than she's ever felt before as his large testicles, hanging lower than a younger man's, swing back and forth under his thick cock, striking against her smooth buttocks with an audible smack. I watch him fuck her until she's twitching and contracting with orgasmic waves and watch him orgasm hard with a loud groan, finishing inside her, pumping her completely full of premium, milky white sperm. He steps back, dripping onto the floor as he looks at her legs, still spread wide open with his cum dripping out of her onto the exam table. He already knows she's on birth control, because he prescribed it. As he finishes, she sits up and they kiss deeply, tongues feeling and tasting the forbidden space of each other's mouths...covered in sweat and breathing heavily. She tells him she's wanted him to fuck her for years, as she steps down to suck the last drops of cum from him, not quite able to get her mouth around the head of his cock. He catches his breath, and tells her he's known that the entire time she was a patient. She turns to me and says "I love my doctor." I can't wait to get her home.