A short while later.

There was a knock on my bedroom door.

"Come in," I called as I sat there at my computer desk fiddling with my tie. It was going on late morning and the blinds were closed with my overhead light on. I was suited and booted to go. White shirt. Black pants. Black shoes. I looked good enough for church.

The bedroom door opened and in walked my first and only patient. "Mrs. Peterson," I said with a smile, "Please take a seat. How may I help you?"

After a little hesitation, Mom walked into my bedroom and my jaw hit the floor. She had definitely dressed to impress and I thought my eyeballs were going to pop out of my skull. She had squeezed her voluptuous frame into a low cut black leather one-piece number that barely reached to mid-thigh and which I sort of remembered from back in the day when Dad was still around and she was a size or two less.

Everything was bulging out in all the right places in all the right ways. To me, she looked amazing with her big tits squished erotically together and pointing directly at me as she took a seat and crossed her bare legs. Between us, on the desk, was the chosen porn mag open at the first page.

Well, doctor," replied my Mother as she wriggled in her seat to get comfortable, "I'm not exactly sure but I think I have a problem with my bottom."

"Your bottom?" 

Mom nodded and sighed. "Something isn't quite right up there, doctor," she explained, "And I need someone to take a look and see what the problem is. Since you're the only one I know who can do anything about it I thought I'd ask you."

"Just to make sure we're on the same page, Mrs. Peterson," I responded as I fiddled with my tie and squeezed my already erect organ under the desk, "Are you saying you want me to give you an anal examination?"

"Well," she said, "That's one way to put it. And if you want to talk like that then, yes, I want you to take a look and see what's making my anus itch so badly. The sooner the better as far as I'm concerned. By the way, I've already made sure I'm as clean as a whistle back there."

The sexual tension between us was palpable as I got to my feet and came to stand in front of Mom who was turning out to be a proper little actress. Standing over her, I had a birds-eye view of her expansive cleavage with each succulent teat barely held in place by her leather top. Those were some seriously impressive titties she had on her that were just made to be sucked long and hard by her ever loving son.

"Let's go over to my uh examination table," I told her indicating my single bed, "And I'll see what I can do."

Mom got to her feet and walked over to the bed as my gaze dropped to her well-packed ass stuffed into her leather dress. Fuck me sideways. Mom had an ass to die for. Big. Full. Absolutely fuckable. She stopped and turned to me.

"Don't you have something that could take a closer look up there?" Smiling at me, she reached over to the porn mag on my desk and turned the page, "Something long and flexible?"

"Actually, Mrs. Peterson," I explained, "I have just the thing we need."

Mom put a finger to her lips. "Ooh," she simpered, "And what exactly would that be?" she asked as she looked around my bedroom.

Maybe I should give her three guesses. Her eyes widened as she saw me pointing at my crotch. "I call it my own personal rectal probe. Works wonders. 100% satisfaction guaranteed. If this doesn't scratch your itch nothing will."

What a charmer. I should be on stage treading the boards. Not so much vaudeville but pornville.

Mom put her hand over my growing instrument. "Oh my," she gasped, putting a hand to her cheek, "It feels so big! How is it going to fit up my bum?" 

Now there was a question that had set sail a thousand ships. Reaching into my pocket, I pulled out one of Mom's thin rubber gloves and with the other presented her with a small jar of cold cream. Voila! Always be prepared for every eventuality. You never know when a little lubrication will come in handy. Ask an Eskimo.

Wriggling my right hand into the glove, I let the elastic end snap back with a surprisingly erotic crack that had Mom staring at it wide-eyed. It was my turn to have a look at the porn mag on the desk to see what we had to do next. Ah. This will be fun.

"So what do you want me to do, doctor?" asked my Mother watching hypnotically as I dipped a rubber digit into the pot and scooped out a blob of cream.

Uh, yeah. What did I want her to do? Where to start? I had a list as long as my arm but I kept to this, as we had agreed. Which was kind of freaky when I start to think about it. From initial shock, through obvious reluctance, to breaking the ultimate taboo, and now enthusiastically encouraging me to play sex games with her, Mom sure was getting into the spirit of things and seemed to be really enjoying our little incest adventures. Not that I was complaining one bit, you understand.

Mom had sat on the end of my bed with her face just about level with my crotch. "Maybe I should take a look at this rectal probe of yours, doctor. Can I take it out?"

Before I could open my mouth, she had already unbuttoned the front of my pants and was tugging down my shorts. Ever eager to please, my pride and joy sprang free to sway gently an inch or so from her lips. Our eyes met as she looked up at me and an unspoken understanding passed between us.

Yeah. Take a good look, Mom. That's one rectal probe you're going to be feeling a lot of in future if I have my wicked way. Her gaze returned to my throbbing cock and she licked her lips slowly.

"Go easy, dear," she whispered going on, " You're much bigger than anything else I've had up there in the past. Just make sure you grease me up real good."

With a last look at my penis, she turned around and knelt on the bed with her spectacular ass high in the air. Stepping forward, I used my left hand to tug her leather skirt over her shapely buttocks to reveal she wasn't wearing any panties. Holy ass bangers. What a sight.

The crack between her ass cheeks was deep, long, and perfectly defined with a glimpse of her already wet pussy peeking out below. It was definitely time to say hello to her secret orifice and I was raring to go.

But first, the lube.

***

"How many fingers?" asked Mom.

My ass-fucking porn mag was open on the bed next to us and I had to use my left hand to turn the page because two fingers of my right were knuckle-deep inside my Mother's red-hot bum. "Three," I replied, "He's got three fingers up her asshole."

Mom twisted her hips as she knelt there with her head down and both hands clasped in front of her as she waited for me to proceed with our kinky little game. I was buzzing with sexual excitement as I stared at her open butt cheeks with my rubber gloved digits firmly inserted into her anus and rectum.

"Well," she winced as she got used to my fingers up her rump, "You'd better shove another one in to make sure I'm good to go."

Be my pleasure, Mom. Her head jerked back and she gasped a pained "Ah!" as I carefully inserted finger number three inside her tight hole and pushed them all knuckle deep. Each finger had been liberally coated with cold cream and any excess oozed out from her back passage to drip onto the bed below. Her ass was tight. Real tight. Getting all of my big cock up there was going to be a challenge.

"How are you feeling, Mrs. Peterson?" I asked her as I removed my fingers and stripped off the rubber glove. Leaning forward, I inspected her reamed pud more closely and it was already looking red raw as it winked at me under a layer of goop.

Below her open asshole, her love juice was dripping erotically from the full lips of her wet pussy. A sure sign she was just as turned on as I was - even more so judging by the way she was rotating her backside from side to side in a primeval sexual dance.

Mom was primed and ready for her ass fuck.

***

Finding my balance, the single bed wallowed from side to side as I tried to concentrate on keeping the head of my swollen cock pressed up against my Mother's anus. Bloody hell, this was harder than I thought as my purple knob slipped and slithered in the pool of lube that coated the crinkly crater of her bum hole. 

Mom was on all fours with her abundant chest flat on the duvet and her thighs spread as wide as possible. Using her hands, she had reached back and pulled her ass cheeks apart so that I had a perfect view of her butthole which throbbed and pulsed in anticipation.

Dammit. Will you just look at that ring piece! What an awesome sight. I really needed to get my cock in there before I could even begin to think straight. Shifting my weight slightly, I crouched further over her backside so that I could use my thumbs to keep the head of my dick jammed in place and help me push it through the resistance of her sphincter.

Finally, the knot of her anus opened a little and I managed to force the head an inch or so into her rear end. Mom instantly reacted and twisted around to stare at me, wondering what the fuck I was doing back there. "Ow, Henry!" she grimaced, "Be careful, sweetie.  You just need to get a couple of inches inside my ass so that it doesn't pop out again. Oh my, you really do have such a big fat cock on you!"

Sweet talk like that will get you everywhere, Mom. Geez, Louise. It was like trying to push a ping pong ball through a straw. Doing as I was told, I took my time and applied more pressure to where it was needed and watched as the lube greased my entry into her anus. 

At last, the muscle gave way enough for me to gain traction and Mom yelped as I managed to squeeze a good three inches into and through her sphincter. Her back passage immediately gripped me like a vice as she got used to my penile penetration and I could feel her fingers gingerly feeling how wide her asshole was stretched around my embedded dick.

"GOD!" she gasped in strained surprise, turning to look at me hanging over her like some sort of ass banging vampire, "God that feels big. Wait. Wait, Henry," Her face was flushed crimson as she settled herself back down and lifted her hips a little higher to ease the pressure inside her rear bumper, "Alright. Now just you take it easy and I'll tell you when to stop if it gets too painful."

Take it easy, she says. Easier said than done when all you wanted to do was hit a home run before letting go with the fireworks. Wincing, I felt Mom tighten her ass as I continued to slowly feed her more of my trapped organ into her. Fuck. It was like we were doing a weird fucking dance between us as Mom controlled my insertion by loosening up a little so I could shove another inch or so inside her lower bowel. Every inch taken made her yelp with her shaking her head furiously and wriggling her backside as I tried to hold on tight.

For a good minute, I was stuck. Couldn't move a millimeter forward or back. The end of my cock was being squeezed in a hot vice and it felt hot and scary at the same time. "Mom, OW!" I complained as I smeared more of the lube around her well-stretched pucker, "I mean, Mrs. Peterson."

My patient let out a long groan and I felt her shiver from head to toe. "How much more to go?" she asked, brushing her blonde hair from her face as she turned back to look at me, "I'm not sure how much more I can take, Henry. I'm amazed I've managed to take so much already!"

"Nearly there, Mom," I muttered as I took a deep breath, "Uh, about a couple of inches I think. Do you want me to take it out?"

She shook her head. "No, no, hon," she gasped, "No point turning back now when we've come so far. Just don't move for a second until I get used to it."

"Okay," Her ass had me in a firm grip so I couldn't move even if I wanted to. My hands were splayed across her lower back forcing her upper body to bend into a bow which raised her hips and ass even higher, "But you're really tight, Mom. Not sure how long I can last for."

Mom didn't say anything but gave a sudden jerk back against me and we both yelped with pain and surprise as the rest of my exposed prong disappeared up her poop chute in one swift lunge. Mom had done it. She had taken my whole prick up her ass. And I was no longer an anal virgin. Fuck me. I had literally gone where no Henry Peterson had gone before. And it was as awesome as I always imagined it would be.

"Are you alright?" What was I doing? Had I hurt her? Looking down, all I could see was my big far spunk filled balls resting either side of her asshole surrounded by my pubic hair. 

Mom waved her right hand around in the air. "NO!" she gasped, "Oh my God, this feels really weird. Okay. Okay, hon. Pull out a bit then slowly push back in so that the lube does its job. OH!! That should do the trick. AH!" she hissed as I pulled about five inches out of her backside. "AHH!" she gasped again as I delicately eased those five inches back into her ass. As soon as I hit dirt, Mom came, "Ahhh Ohhhhh!!" she shuddered as her body reacted to her initial anal orgasm, "Oh fuck, Henry!!"

Taking that as a sign we were good to go, I began to fuck her butt with short five or six-inch strokes that stirred the lube around my invading pole to make my penetration so much slicker and easier. A couple of minutes into the fuck and I was shafting her naughty orifice with enough force to bounce my nutsack against the leaking lips of her pussy.

It was about then that Mom completely lost her composure and let rip with some seriously arousing verbals as I pounded my way inside her like a punch drunk chihuahua. No doubt about it; fucking my Mothers ass was on a whole different level compared to fucking her pussy. Doing it this way was way WAY more intense and erotic.

Mom was loving it big time. "Oh, you big cocked bastard," she whined as she arched her back against me, "God, I love it up my tight little asshole. Oh fuck. OH FUCK, BABY!!" Another climax as she scrabbled around on the bed in front of me, "Fuck it right up me, Henry. Right up my cornhole. As deep as you can, sweetie. Oh my God, That's it. Oh my. Yes, yes, YES. RIGHT THERE. Oh shit, coming again. Keeping fucking my ass, Henry. And here I come AGAIN!!"

Whoa. Shit. If I wasn't careful, we were both going to end up on the floor. Ride her cowboy. Geez, hold still Mom! This was fucking crazy. Fuck knows where the porn mag was. We were writing our own story now. Doctor Henry had given his patient a thorough examination and was about to treat her with the best kind of medicine for her little anal problem. I was in butt fucking heaven and loving every second of it.

But I knew it couldn't last forever. Not at the rate we were going. This was way too much for me to keep control of my libido which was coming to the boil really fast now. My balls felt full, firm, and heavy as they spanked her love button at the end of every thrust. One thing was for sure, I was about to give her the ultimate enema that would flood her asshole and blow both our heads clean off when I came.

Which was just about now.

"HENRY!!" cried Mom as she felt my spunk explode and spurt deep inside her bowel quickly filling her up so that most of it oozed out around my fully embedded cock as I fell forward onto her with my weight pushing her flat onto the bed. So much spunk passed from me to her in that moment, as we both collapsed with the sheer delight and effort of our first ass fuck together. As I covered my panting Mother, something made me lift my head and look to my right. 

There in my wardrobe mirror, I could see a young man on top of an older woman. They were both naked and the man had been sodomizing her. The woman had a hand under her so she could play with the lips of her wet vagina and use her index finger to slowly rub her clit. Above her natural sex, his still hard penis remained deep inside her anus with a bright white corona of fresh semen seeping...