[Incest] Doctor Enjoys Bro’s Big Dick

**All characters are strictly over the age of 18**

I’m a urologist.

Not many women work in this field, but I chose this specialty because of my fascination with penises. And I get to see many of them. Even though most of my patients are older, I get enough young and middle-aged men to keep it naughty and interesting for me. I’m married to a kind and intelligent man, but sadly, his sexual prowess left a lot to be desired. I loved cock too much to resign a life of sexual unfulfilment.

I checked my patient list and smiled. My last patient of the day was a young man with an erection problem. According to the notes, once his penis was fully erect, it did not get soft, even after an orgasm.

Of course, I didn’t believe it. Probably he experimented with Viagra or something. Who knew what 18-year-olds got up to these days?

I did, however, wanted to see the phenomenon with my own eyes.

There was a knock on the door, and I called out for them to enter.

A young man shuffled in.

“Hey, sis,” he said nervously.

“Hello, Billy,” I said with a smile.

I understood his nerves. Most women didn’t work in the urology field. And he probably didn’t expect his older sister to be looking at his ‘problem’.

Penises always intrigued me. Working as a urologist paid well and got me in close proximity with dicks.

Especially when it came to fine young specimens such as my cute little brother.

“Oh, I thought…” he started.

“That you were expecting doctor Gupta? He had a family emergency and I’m looking after his patients today.”

“Sorry, I didn’t mean it that way. It’s just embarrassing.”

“Nothing to be embarrassed about. I promise you, anything that happens in this room stays in this room. Have a seat.”

He simply nodded and sat on the examination table. I knew he wasn’t fully convinced, probably dreading his predicament, but I found it was best to just push ahead before the patients lose their nerve. My little brother would be no different.

“First, let’s get through all the boring checks. You’re Billy Madison?” I asked, looking over his file on the computer.

“Yes.”

“Eighteen years old?”

“Yes.”

“Do you smoke, drink, or take any recreational drugs?”

“No. Just drink socially.” There was a pause. “Okay, I may have smoked a joint at a house party a few weeks back. Don’t tell dad.”

“I won’t. Doctor-patient confidentiality.”

I looked up from the computer and smiled at him. “Try to relax, Billy. This is just a routine examination. If there are any irregularities, I promise we will find and resolve it.”

“Okay.”

“For now, why don’t we change you out of those clothes? There’s a gown behind the screen. Make sure to take off your shoes, too. I want to give you a full medical checkup.”

He went behind the screen and a few minutes later came out with nothing but the gown on. The front was tied together with ties. He shimmied up onto the examination table, trying his best not to let the front slip aside and expose his penis.

Cute.

I went over and untied the gown. As I pulled the front open, his hands shot over his penis.

“We will start off with an inspection of the genitals,” I said in a very matter-of-fact tone.

“Sis, wait.”

I pulled his hands away from his crotch. I was surprised to see his foreskin covered most of the glans, with the tip still exposed. In most cases, when the penis became erect, the foreskin would roll back, fully exposing the head.

“Excuse me,” I said.

I took hold of his penis and peeled the foreskin back. My little brother’s crown looked like a fat purple plum. I massaged the area with my fingertips, and his dick pulsed and started to enlarge.

“Oh, God, I’m sorry,” Billy said, his eyes wide with shock.

He was mortified to have his cock reaction to his sister’s touch. He had no control over it.

I was sure he would have preferred to stay flaccid, but I wanted him nice and hard. I swallowed as I watched it inflate in front of me.

After it was fully erect, I proceeded to start jacking his shaft, rolling his foreskin all the way back and then up over the head.

“Relax, this is part of the examination.”

“D-do all doctors do this?”

“I doubt my male acquaintances would. It’s very invasive,” I said as my hand trailed slowly up and down his shaft. “But this is the most effective method for finding irregularities.”

“I-I guess,” he groaned.

“Any pain or discomfort?”

“Apart from me dying of embarrassment? Everything feels fine. Good even,” he groaned.

I smiled and continued.

As I milked his cock in slow, languid strokes, his body would pulse against me. Precum leaked out from the tip. No man could resist my hand job techniques.

“Sis…” He said, his face went tight.

“Are you in any discomfort?”

“No, I- Please you gotta stop, I- Oh, shit..! I’m so sorry!”

I didn’t plan to make him cum. Not at least after a few appointments, but my plans went straight out the proverbial window as a fountain of cum blasted out from his cock.

“Fuck, stop,” he begged.

But I couldn’t stop. One of my addictions was to watch a man as he climaxed, watching his face as he endured the throes of pleasure.

I furiously pumped his big thick cock, forcing hot spurts of cum to shoot out from his tip. His body was tight with tension and his face was a mask of post-orgasmic bliss.

Cum sprayed everywhere. It spurted out like a geyser, hitting his navel, up his chest and the sleeve of my doctor’s coat. Some even stained my hand, not that I minded.

I didn’t want to spoil his orgasm, so I continued pumping his cock until he was completely emptied out.

“Oh, God,” he huffed. Spent, his body relaxed and fell back onto the examination table, gasping for breath.

I let go of him, which was still shockingly erect. It was sticking straight up like an obscene golf flag pole.

While he recovered, I got on with the task of cleaning up the cum with some disposable towels. Semen was everywhere, so it took a while. It was all over him, all over me, on the examination table, and on the tiled floor.

“I’m so sorry,” he gasped.

“Don’t worry about it. I should take responsibility too. I didn’t notice the warning signs of your pending ejaculation fast enough.”

While I wiped up his cum, he continued apologizing.

I walked over to him and grasped his cock. I just loved how it pulsed in my hand.

“Don’t apologize. You did nothing wrong. What happened is a normal physiological reaction. When your penis is stimulated, the reaction is inevitable. Don’t be ashamed of enjoying something natural.”

“Thank you,” he mumbled.

“There is no problem with his erection, from what I observed.”

“But it’s still hard,” he said, pointing to his painfully erect cock. “It only gets soft after cumming several times. Girls can’t seem to deal with it.”

I climbed up on the table with him and knelt between his legs. These were solidly built tables- I had full confidence that it would support both our weights.

“Young ladies nowadays can’t seem to appreciate a good thing when they see it,” I breathed. He didn’t stop me as I got dangerously close to his member. I inhaled, drawing in the thick masculine aroma that went straight to my aching pussy.

“Would you like me to help provide some relief? I know I’m your sister, but I can make the discomfort go away.”

His breathing was shallow, desperate. I could see the desire in his eyes. “Yes, please.”

“Good boy.” I grasped the base of his shaft, pointing his dick towards me and then enveloped his large head into my mouth.

“Oh, fuck,” he hissed. He drew in a breath between his teeth as my lips closed over his shaft. I swirled my tongue around the head, making his body squirm with pleasure.

“Oh, God, sis..!”

I loved sucking cock. Especially one with a large head like this one. The fact that it was attached to my little brother only made it all the more exciting.

Many men I had pleasured orally considered me a world-class cocksucker.

I applied more suction to his crown and then let my lips slide down over the head and onto the shaft. I groaned inwardly as I tasted the salty-sweet precum on my tongue.

“Can you keep your mouth shut?” I asked him.

“Huh? Y-yes, of course.”

“Good. Then I feel better doing this.”

I took his tip into my mouth and began to slide it down my throat. It almost felt like a python devouring its prey. I giggled to myself, watching his face. Poor Billy didn’t know what to make of his own sister taking his entire cock down my throat.

I backed off a little and slowed down when I felt him reaching his limit again. I wanted to enjoy the moment for as long as possible. Professionally speaking, it also facilitates the maximum amount of ejaculation, thus speeding up his recovery.

Billy was thick, one of the thicker men I had the pleasure of sucking off. As a challenge of sorts, I took his cock right down to the balls, almost making me gag in the process.I was so proud of myself when my nose brushed against his pubic bush.

Then I started bobbing my head up and down, using my throat muscles to milk his gorgeous cock.

His hands gripped the sides of the table. “T-Tina… Oh fuck..!”

Urged on by his desperation, I put him out of his misery. Young men really had no patience. I would need to spend plenty of time training him. I supposed inexperience had its allure, too.

Billy cried out as his cock swelled in my throat. With a desperate, needful grunt, each spurt shot down my throat as his cock pulsed uncontrollably, and his body bucked and writhed in unadulterated ecstasy.

Then something happened to me.

The act of pleasuring my little brother had a profound effect on me, too. So I reached down and teased my pussy, in an attempt to alleviate some of the pent up frustration. But it had the opposite effect. It felt too damn good having my brother’s thick cock down my throat. It made me hyper sensitive. Every stroke of my finger over my clit sent waves of pleasure through me. His cock swelling in my mouth, dumping load after load of hot, thick cum in me, pushed me over the edge and I came hard. The world turned white, and I tried to focus, greedily swallowing as much of his cum as possible.

I was impressed by his vigor. Despite cumming so much earlier from my ‘massage’, it seemed like he still had plenty stored up.

When he was done, I let his cock slip off from my mouth and I opened wide, showing him his cum before I swallowed. I wanted him to remember this as the best sex experience of his life.

“You have one of the nicest penises I ever had the pleasure of sucking,” I said.

“Thanks, sis.”

I enjoyed jacking him and sucking him off, and true to his claim, his cock was still rock hard.
That all too familiar need, that craving, grew inside me. I needed his big cock inside me.

I was curious to see what my brother’s cock would feel like stretching me out.

Semen dribbled out from his tip, so I leaned over and licked it clean. His cock slid into my mouth again and I let my tongue roll over the crown, licking and sucking on him gently to clean it up.

“Billy, I think we need more drastic measures. Clearly, your penis is still not satiated, so I feel compelled to do everything in my power to help you.”

“What do you have in mind?”

I got off the examination table and removed my clothes.

I had a great amount of pleasure watching him eye up my body. I didn’t know any man who could resist the allure of my big breasts, womanly curves and tight pussy.

I hope Billy was curious to find out about the last bit.

“Would you like to have intercourse with me? Of course, everything we do will be bound by patient-doctor confidentiality, so don’t worry about anyone finding out about this.”

“Damn, I’d love to, if it’s okay with you, sis.”

I smiled and climbed back onto the table and gave him a few minutes’ worth of cock sucking.

No longer able to ignore the ache deep inside me, I straddled him, grabbing his shaft and aiming his dick directly towards the entrance of my pussy.

“I’m going to have to control the penetration. A cock as fine and big as yours might hurt me if you get too enthusiastic.

He nodded, and I held the lips of my pussy open with one hand. With my other hand, I guided his cock to my opening.

I dropped my hips ever so slightly until my pussy kissed his tip.

It started going in, but then it stopped.

Fuck, he was a big boy.

I licked my lips. It felt divine, but I might be too tight for him.

I was determined to take him inside me, though. I rocked my hips up and down, each movement taking a little more of him. I hissed at the sharp bite of pain, his bulbous head stretching my opening. I didn’t care. I needed to feel him in me.

I thrusted down as hard as I could, and maybe I took in half of his shaft.

“Oh, fuck, sis. You’re so tight..!” he husked.

“You’re so nice and big inside me, Billy,” I moaned, feeling my thighs buck from the strain and sweat beading down my forehead.

I bounced up and down, making small strokes. As the discomfort mellowed over, I let each stroke go a little deeper. Luckily, I was so turned on from having such a big cock, I was soaking wet with need. My juices helped with lubricating him.

I braced my hands against his hard abdominal muscles. A few more strokes later, my pussy kissed the root of his cock.

“Finally,” I sighed with satisfaction.

I was in heaven. I told him I was going to start moving, and I moved my hips up and down, my pussy milking his cock with each delirious stroke. He was so thick and deep inside me, it was like a mixture of pain and pleasure.

I hissed through my teeth, enjoying the feeling.

“Sis, can I touch you?” Billy asked. His eyes were fixated on my breasts.

“Of course. Apart from nourishing, breasts are also used to enhance the sexual experience. Touch me as you please.

My brother swallowed and reached out, taking each breast in his hands. They were more than a handful for him, and I felt my nipples harden against his touch.

I sensed a tinge of reluctance in him. Some remnants of shyness still bubbled inside him.

I clasped my hands over his as I rocked, tightening my pussy around his cock, and milked him. I guided his hands until his fingertips brushed over my nipples.

“Yes, that’s it,” I cooed. “Don’t be afraid to explore. Play with them. I will let you know if you do anything I don’t like. Communication is key.”

He took my advice to heart, and I felt him relax. I moaned as he tugged and fondled my nipples.

I leaned forward, letting my tits droop over his face. Billy understood and took a nipple into his mouth and sucked on it.

“Yes, that’s it,” I groaned, rocking my hips back and forth, feeling his length rake my insides. “Suckle on them, little brother.”

Billy grunted, and I felt his energy change. His tongue lashed against my nipple and he started moving, his hips meeting my thrusts.

He wanted to lead.

I smiled and let him take over, let him drive his cock up into my cunt. “Fuck me as hard as you can.”

He groaned around my nipple, sucking on it a little too hard, sending a sharp bolt of pain through me.

I didn’t mind though, finding his newfound enthusiasm intoxicating. I cradled his head with the crook of my arm, whispering into his ear. “That’s it, fuck me. I want you to cum in me, okay? Give it all to me, little brother. Fill me up.”

His face went tight, and I knew he was at his limit. Like a woman possessed, I bounced back against his movements, taking him as deep in me as possible.

I knew it was going to end, so I wanted to make the most of it.

“Sis, I’m going to cum. I’m cumming!” he yelped.

Sweat slicked between our bodies as I pressed myself tight against him, pushing my mouth onto his lips. He groaned and my tongue snaked in, finding him. He mumbled something into my mouth, and his hands clawed my buttocks, holding me tight against him.

I cried out, letting another orgasm wash over me as I felt his cock swell in my pussy. He held me tight against him, not letting me go as he emptied his cum deep into me.

God, I took it willingly, savouring the sensation of hot, potent cum flooding my womb as my body shuddered with orgasmic pleasure.

His hips kept rocking, as his body tried to force as much of his life force into me, driven by the one singular need to inseminate me.

If I wasn’t on contraception, I would surely be impregnated by a young buck like him.

We lay there together, spend and exhausted for a moment.

I slowly got off him and his cock slid out of me, leaving me a gaping mess with globs of cum leaking out of me.

I hopped off the table, and with a sudden flash of mischievousness, I bent over and took his flaccid cock in my mouth and sucked our juices off.

“Fuck,” he shuddered.

He was definitely a good fuck.

Then, rather unceremoniously, we both got dressed.

“We made good progress today,” I said, giving him my assessment. “Considering the amount of times you can ejaculate before you are done, I think many women will find that a plus in a sexual relationship. Your size may be of a concern, but you will have to find a partner who is understanding of that – not all women like big penises.”

He nodded.

“I recommend finding a steady partner. That would be the most efficient way to keep your libido levels in check. Until then, your sister will be more than adequate.”

I made him an appointment for a follow up assessment, and I was already looking forward to feeling my brother’s hard cock inside me again.

Source: reddit.com/r/sexystories/comments/vhasht/incest_doctor_enjoys_bros_big_dick