AUTHOR'S NOTE: This short takes place some days after post #2194314.
Max (20 years old) and Krystal (his stepmom) are building a stronger bond after the boy's sleep shenanigan. This is the story of one of their first fiery night sessions.

The city slowly felt asleep as the night grew darker, the fresh breeze swept away the day's warmth and entered the window, slightly lifting the curtains.
The canine couple laid in bed, kissing passionately and wrapping together in a spaghetti-like mess of limbs. The silence of the apartment was filled with the echoing sound of popping kisses and heavy breathing.
Max pulled away from his stepmother, leaving a shiny string of saliva still connecting the two pair of lips, still struggling to breathe and with his heart racing he begged: <<Mom... I-I can't wait anymore... can... can I?>>.
Krystal, being a good step-parent, read immediately his son's intentions and shushed him by placing her finger on his mouth: <<Mommy is all yours tonight>>.
The vixen spread her knees apart and let the boy's hips between her legs. She grabbed his butt and pulled him against her, making his stiff shaft rub between her labia and squeezing and abundant teaspoon of precum out of him.
Max buried his face between her breasts and squirmed in pleasure, desireful to be one with his mother.
He repeatedly thrust against her, with little success. The experienced fox noticed the young man's struggle: <<Wait, let mommy help you>>. She grabbed his pulsating penis and guided the tip inside of her vulva, with a calming voice she added: <<Max, I want to feel you inside me... please don't hesitate, mommy really wants it>>.
Maxwell pushed his pelvis forward, entering with little effort in his mother's lubricated cavity. He slowly advanced millimetre by millimetre, tasting her tight and warm insides.
Without warning, Krystal grabbed his hips and pulled him all the way in, stopping only at his bulbous canine knot: The sudden stimulus sent an electric shock of pleasure through both of their bodies; Max's penis throbbed violently and repeatedly. Her vaginal walls answered by tightening around him like a clamp.
<<M-mom, It feels s-so good..>>: cried Maxwell, while concentrating on his body's sensations. <<I know right? the best has yet to come, now why don't you start going back and forth for me? will you?>>: Kindly asked Krystal.
The boy promptly obeyed and moved inside of her.
A couple of minutes passed: his mind was lost in a sea of pleasure, his mouth gaped like a hungry sex-zombie, his eyes were lost, admiring obsessively the female body in front of him, which for years he had always desired.
Krystal had left herself at her stepson's grace, allowing him to do what he wanted and how he wanted, he was her son, and she would leave him enjoy her body as he wished. She did it for the maternal love, not for the physical pleasure like she did when she was younger.
Speaking of physical pleasure: he wasn't the biggest guy she had laid with, nor the most talented one, but sure he was eager...
Max's thrusts grew faster and his breathing became irregular:<<M-mom I... I'm about to cum... I really need to knot you>>: Squealed the boy, interrupting Krystal's thoughts.
He was a couple of pushes away from ejaculating... with a skillful swing of her hips, the blue vixen managed to make him pull off. He frustratingly rocked his hips in the air, hoping that that would help him achieve satisfaction, he was on the brink of orgasm, but that wasn't enough. <<Mom why? Why did you do that!? I was so close...>>: protested Max. <<Mommy wants her fun too my child...>>. Max suddenly realized: he had thought only about himself, she used her like a fucktoy without thinking about her feelings nor her pleasure, he felt like such an idiot...
<<Maxwell come... I want to try that thicker bit, I think I can fit it>>: she said while rubbing her labia, inviting her son to continue.
Max approached her mother, grabbing her left leg and placing it over his shoulder. He placed the tip of his penis inside her sleek pussy and said:<<Mom I want you to feel good>>. Krystal smiled at his son and looked at him in the eyes:<<I love you Max>>. Max slid his penis inside of her, stopping only at the knot: <<I love you too.. UGH! M-MOM!>> Grunted Max, trying to push the base of his canine dick inside of her. Krystal moaned as her lips stretched around the meat attempting to enter her. Max backed off, breathing heavily and fatigued by the effort: <<Ugh, Mom... I could not make it>>. <<It's ok, let's try again, it will fit eventually>> Answered Krystal, encouraging her partner...
Max took a deep breath and backed off slightly, he stopped for a second, loading up all of his energy; he threw all of his body forward and loaded all of his weight on his hips; his knot slammed against his mom's vagina, stretching around his large diameter. <<M-Mom... I'm almost there>>. Krystal, moaning in a mix of ecstasy and initial discomfort, was still focusing on helping his son: she spread her legs to her flexibility limits and stretched her pussy apart with her hand; Max's knot slowly gained momentum... he was roughly 3/4 in when a loud and sloppy *pop* echoed in the room. The action was so violent he almost fell forward, having to brace against the bed.
When he could focus again, he was inches away from his mother’s face, who was slowly and loudly moaning, he lifted himself up, finally being able to look at his artwork: his knot had vanished inside of her, a strong pulling sensation filled his shaft, together with Krystal's muscles tightening around his swollen bulb and sending orgasmic shivers up his spine.
<<agh.. agh... M-mom a-a-are you ok?>> Asked worryingly the boy... <<ugh... agh... yeah... fantastic... now... would you mind... tugging it out... and doing it again?>>.
The young man, acknowledged and tried pulling himself out of her, as soon as he moved, another pleasant wave ran inside of him, his member swelled up, sending the same wave to Krystal's inside, who screamed in bliss.
Max tried again slowly, pulling away and resisting the pleasure of the lock with his mother, who was too struggling to hold her moans. Again he struggled to pull out the thick knot her, he applied constant force, and observed as the fox's labia unwrapped around him. As the knot jolted out of her, another popping sound could be heard in the room, and a milky stream of pussy juice splurted off her orifice.
Max did not pause, and immediately thrust forward, stuffing his knot inside of his mother, this time with much less effort: her muscles were slowly relaxing at each pass, and it was soon clear that this type of intercourse was sure possible.
<<Mommy feels so good, don't stop Max... Don't Stop!>>. Begged Krystal, who had found this new talent in the boy's sex arsenal.
Max kept at it, it was sure something new to him: he only used his bulbus to cum, and never thought he could actually please a woman with it. It wasn't sure an easy task, but he soon found his pace: Push, *pop*, Pull, *pop* and repeat... It felt very strange to have his genitals compressed and pulled in that way, compared to typical sex where it would all be a back-and forth and then a sudden discharge of pleasure... this was way different: like if at every time he knotted his mother, he felt an amazing shock traverse his body and every time he pulled out, he was tickled by the friction of her pussy spitting him out... Push, *pop*, Pull, *pop*
<<Max... Max... oh yesss... keep doing this... and mom will come for sure...>>. Push, *pop*, Pull, *pop*
Max observed as his stepmother's body rocked back and forth at every thrust... Push, *pop*, Pull, *pop*
He noted her body language, as she rubbed her clitoris, held her own breast, bit her lips or threw her head back... Push, *pop*, Pull, *pop*
She moaned and moaned and moaned and moaned... Push, *pop*, Pull, *pop*
Max liked this, and seeing his mom react like that, multiplied his delight by the hundreds... Push, *pop*, Pull, *pop*
The build-up of pleasure suddenly reached a boiling point for both of them: <<Max... Maxwell... Faster! harder! Mom is so close...>>. Moaned the Blue female. The boy did not hesitate for a second and slammed his cock inside of her, knotting her for good and fucked her mercilessly while fully inside, this allowed him to increase his pace to his limit and commit to orgasm.
<<Ah! Ah! Ah! More! More! Don't stop!>>: Screamed Krystal, as her vagina spring-loaded like a bomb about to blow... Max could now feel his insides boil... that familiar sensation, except a thousand times stronger... He grunted as he kept slamming his crotch against his mom's stuffed pussy, he could feel the tip of his penis kiss her cervix, like poking a very small ring...
It was too much, he could not hold it anymore... his body acted on his own as he pushed himself one last time against Krystal, who was already twitching all over from a powerful and lasting orgasm, her pussy tightened around her son's dick, which simultaneously throbbed and squirted cum deep inside of her; his knot swell up to a maximum, locking the couple together for the hours to come.
The boy collapsed to his mother's chest, struggling to breathe and still slowly rocking his hips as he depleted every last drop of seed from his testicles...
Krystal wrapped her legs around the boy's hips and hugged him caressing his hair and the fur on his back.
<<Tonight you made mommy so proud... I can't wait to do it again>>: Added the satisfied fox, but to no response of her son... She tilted her head to the side and saw that he had fallen asleep... She smirked slightly and kissed him on the forehead:<<Goodnight Maxwell, I love you...>>. Concluded Krystal laying her head on the pillow, with her stepson still inside of him, laying on her body... she felt a warm pulsating sensation inside of her womb... she was full... he must have been so pent up... she closed her eyes, feeling her son's heart beating on her stomach and between her legs... and let herself fall in the land of sweet dreams...

THE END