COMMISSION: BETH AND SAMMY in:
Teaching Her Son For His Birthday

by OttersInTrousers

written for an anonymous commissioner

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When Beth goes into heat only a few days before her son's seventh birthday, she decides to give him a birthday gift he'll never forget.

Mother/son cub incest, written for an anonymous commissioner.

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With a long sigh, Beth steps out of the bathroom. Having just finished her shower, the plump golden retriever is wearing a comfy nightgown and nothing else. After a day of her heat rapidly blooming into an uncontrollable inferno in her womb, the 32-year-old would like nothing more than to just head to bed early and take care of herself. However, instead—

"Can we pleeeeeeeeease watch a movie?” the voice of Beth's darling son, Sammy, pleads. “It's Friday night, and it's my birthday!" The cute little six year old—seven in two days— golden retriever bounces up and down on his pawtoes in front of Beth, then does his very best pleading puppy eyes.

She gives in, of course. She shouldn't, she knows she shouldn't. But he's so sweet, so good, so cute.

"Okay, honey.”

“Yippee! Thanks Mama!” Sammy throws himself into her, arms doing their best to wrap around her chubby belly and tail wagging. She pets his head.

“Why don't you pick out which one, and I'll get the popcorn ready." She watches with a smile as the pup scrambles to get things ready, the throbbing need in her loins nearly forgotten.

When she returns to the living room with a big bowl of fresh popcorn and settles onto the couch with the bowl in her lap and Sammy at her side, she's expecting an animated classic. What she gets is something decidedly more mature. It seems to be some sort of thriller? Mystery?

Five minutes in, she turns to Sammy.

"You let me know if this gets to be too much for you, okay baby?"

"Okay, Mama." His eyes don't leave the screen as he leans against her side, head pillowed on her big soft breast. He reaches blindly into the bowl to dig around, pressing it down on her lap. She rubs her thighs together against the pressure. He sniffs the air. "You smell nice."

The next thirty minutes pass by in an aroused haze. She only snaps out of it when she feels him shifting against her. Oh. This scene is rather risqué. She chances a glance at Sammy to find he's transfixed, and—there is an obvious tent in his pajama shorts. 

On-screen, the couple make out, their hands trailing up and down bodies, moaning. The lead—a svelte cheetah woman with a purring voice and a familiar face Beth can't place—pulls back from her lover—a busty wolf whose dress leaves very little to the imagination—to groan out, "Let me take care of you." Then she trails kisses down her paramour's body and dives between her thighs.

What is this film rated?! Beth's pussy clenches down. Oh no, she's gonna cum just watching this scene.

Sammy wiggles and pants, tent bobbing. Gods, he's really into it. Beth is too, but—she hadn't realized he was getting to that age yet. His hand moves down to touch himself.

Oh no, she's gonna cum just watching Sammy.

"Baby," she beings, and is interrupted by her own panting. With a shaky hand, she reaches across him—don't touch his erection don't touch his erection—to pause the film. "Ma-Maybe we should stop this for a moment."

"What's wrong, Mama?" The pup turns to her, obvious worry in his bright sky-blue eyes. 

"Nothing's wrong, baby." She tries to be reassuring, but then he's sniffing the air again, sniffing her again. "That scene's just a little, um, adult," she tries, stuttering as his snout drifts between her legs.

"Oh. Okay." That seems to be enough to him, but then, "You smell real good down here, Mama."

She can't believe it. Her son is sniffing at her heated spade. Through the fabric of her nightgown, she can feel the warm puffs of air from his nose. She whimpers.

Temptation surges within Beth. Her son, precious, darling, good boy that he is, is sitting pressed up against her, little erection tenting his shorts, snuffling her pussy. It would be so easy.

But he's her pup.

But it's so bad. And she hasn't had a sexual partner since before Sammy was born, too busy with caring for him to find someone. And she needs some attention. And he's obviously interested.

Maybe it would be okay. Maybe she can treat her heat and give him a birthday gift he'll never forget. 

Just this once.

-----

"Why don't we talk about this. Mama can teach you."

"Okay!"

Hands vibrating with a mix of arousal, excitement, worry, Beth lifts the hem of her gown. Up, up her thighs, to her hips. Her pup unabashedly stares as she gathers it at her round belly to display for him, up close, her naked spade. It glistens with her arousal, plump with need.

"Whoa."

She can't help but laugh.

"This is Mama's spade. Do you like it?"

He nods.

"It's so pretty. Why's it so wet?"

"You know how when you were watching that movie, and you got excited, your willy came out of your sheath?" He nods at her, so she continues. "Well, when someone with a spade like Mama gets excited like that, it gets wet."

"Oh. Cool." His next question catches her off guard. "Why's it get wet?"

At the back of her mind, an alarm sounds. Beth ignores it.

"How about I tell you that in just a bit. First, you know what the cheetah was doing in the movie?"

"She had her muzzle down between the wolf's legs."

"That's right. She was licking that wolf's spade. Why don't you—" she swallows thickly, pants, tries again. "Why don't you try licking Mama's spade? It'll make me feel real good."

"Okay!" He moves to the floor, between her knees, and she scooches her hips forward, spreading her legs further. He leans in.

That first, tentative lick is nearly enough to drive her over the edge.

“Ohhh, honey that feels so good. Keep going, baby, that's a good boy.” 

He moves in with far more gusto after that. 

She snakes one hand down her belly to rub at her clit, the other up under her gown to play with her tit.

“Sammy!” She plants her paws and thrusts her hips forward to grind her pussy against his snout. Clever boy that he is, he doesn't pull back, nosing in and licking deep. He giggles and drinks deeply of her juices when she squirts into his maw.

When she drops back down, gasping for breath, darkness creeping in at the edges of her vision, he pulls away to hop up, ears perked.

“That was the coolest thing ever!” He puts his hands on her knees to lean in over her. “You taste real good, Mama!”

“I'm so glad you liked it, honey.” Beth reaches out to scritch behind his ear. “My sweet Sammy. What a good boy you are.” 

His tail wags at hyperspeed as she pets him. Then she notices the mess she made of him—the fur of his snout is sticky-slick with her pussy-juice, and his shirt is splattered.

Catching her breath, she sits forward to finish taking off her nightgown. Sammy gapes at her tits when they drop free.

“Do you like Mama's boobs?” He nods. “Why don't you take off your wet shirt, then come here. You can play with them while Mama cleans you up.”

As she uses her gown to wipe off his face and get what soaked through his shirt, he gropes at her breasts. He hefts up one, then the other. Squishes them together. Jiggles them. Pinches one nipple and lifts the breast by it. By the time she finishes cleaning him up, she's ready to go again. But first, she has something else in mind. She moves a hand down to hover over the tent in his shorts and notes the wetness at the tip.

“Since you were such a good boy, Sammy, how about Mama returns the favor?”

He tilts his head at her, ears flopping.

“How? I don't have a spade to lick?”

She giggles.

“No, baby, but you do have a penis, and Mama can still user her mouth to make you feel good.” She pats his back. “Come on, let's switch places.”

Without her asking, he shucks his shorts, little dick bobbing in the air and flicking a droplet of precum into the fur of her thigh. He hops onto the couch as she slides off and positions herself between his legs.

She takes one slow lick up his penis, sheath to tip, then takes the whole thing into her mouth.

She has him cumming in thirty seconds. It's adorable.

“Mama! Mama!” he cries out, his hands finding her head and holding onto her as he gives a few quick little humps into her maw and spurts.  

She drinks down his weak shots of cub cum, savoring the taste.

When he's done, lying boneless on the couch, she stands from the floor and sits beside him, then shuffles him onto her lap. His tail wags.

“I love you, Mama.”

“I love you too, Sammy.” She squeezes him tight, then frees one hand to start toying with his little penis. “Honey, Mama wants to give you a very special birthday gift. Is it okay if it's early?”

“Mhm.” He nods into her breast. She keeps working his little cock until it's hardening again. Bless the enthusiasm of youth.

“Mama loves you, so so much. You made Mama feel so good. Now, how about you make us both feel good?”

“Okay!”

“Know how you put your tongue in Mama's spade before?” 

“Mhm! It tasted really good.”

“Well, this time, why don't you take your penis and put it in Mama's vagina?”

He's up in an instant, allowing her to turn to the side and lay back across the couch. He clambers up and between her legs, scooting his hips against hers.

“Mama loves you, baby.”

“Love you, too, Mama.”

She takes his penis in hand, and guides the tip to her swollen, Y-shaped entrance. He barely waits to be in position before thrusting in, all the way to the hilt. They moan in unison.

It is ecstasy to have a penis inside her again.

“That's it, honey. You're doing so good.” Using her hands on his hips, Beth guides Sammy to start humping into her. He picks up quickly, and sets to it himself. “This is called mating. This is why Mama's vagina gets wet, so it's good and slick for you to put your penis in. Yeah, mate Mama. Good boy.”

“Mama, it feels—so good!” He pants between her breasts as he humps away.

“I'm glad, Sammy. You're doing such a good job.”

“Mama,” Sammy pants out. His thrusts become uncoordinated. “I'm getting tired.”

It's clear he won't be able to get them off himself. That's okay, Beth is happy to take over.

“Oh, that's okay, baby. Here, you stop, and we'll switch up.” 

“Okay, Mama.”

“Scoot back and hop up real quick.” When he does, she pets his head and rises herself. “Now you lay down on your back, and Mama will take care of everything else.”

He takes her place on the couch, lying back along it, his little cub cock standing straight up. She climbs over him to straddle his hips.

“You're so pretty, Mama.”

He says it with such adoration, such love, it catches Beth off-guard momentarily.

“Oh, thank you, Sammy. You ready?”

He nods. She takes hold of him again, lines them up, and lowers herself to engulf him again.

She starts by grinding on him, forward and back, small circles. He lifts his arms like he doesn't know what to do with them, so she guides his hands to her hips.

Then she sets into riding him properly.

He's small, and so is his penis, so she can't risk putting her whole weight on him and can't lift very far without him slipping out. She keeps her legs folded underneath her, and focuses on rapid short bounces.

He giggles, drawing her attention away from her efforts. She slows a bit.

“Yes, Sammy? What's got you giggly?”

“When you're bouncing like that,” he manages between giggles, “your belly and boobies jiggle around!”

“Silly little boy.” She leans down to kiss his forehead. “Hang on tight, Mama's gonna jiggle a little more, 'cause she's almost there.”

“Okay, Mama.”

She sets back into it, spade kissing sheath with a frantic pace. Every few bounces, she breaks it up with a couple grinds. Her hands work at her nipples, squeezing and kneading. She can feel it, she's so close.

“Mama!” Sammy's worried voice breaks her from her focus again. “I'm gonna do the thing again! It's—coming!”

Sammy's going to cum inside her.

“Do it, baby. Give Mama all you can.”

He does. He goes stiff, grunts, and then she feels it—his little penis jerks once, twice, and then warmth spreads around its tip.

Beth cums.

She cums like she hasn't in years. A pussy-clenching earthquake of pleasure strikes her body, sends her shaking and crying. She moans Sammy's name to the heavens as she feels his puppy seed spurt into her heat-stricken vagina.

As she catches her breath, her pup speaks.

“I'm sleepy, Mama.”

“Okay, baby. You rest there. You did such a good job, Sammy. Mama loves you. Thank you.” All the while, she softly pets him, grooms his fur with her claws and tongue. He's snoring within a minute.

Carefully, she lifts herself up, noting with trepidation that she hadn't taken his knot. She stretches out her aching knees, then she gathers him up in her arms, and carries him to his bed. The soft plip plip of their combined fluids leaking from her spade accompanies her the whole way.

-----

“What were you thinking, Beth? Obviously, nothing, because you're in heat, but you fucked your son!”

Beth is seated on the edge of her bed, head in hands, as she berates herself.

“You fucked him unconscious.” A voice in her head helpfully supplies that she didn't, she just tired him out.

“He's a puppy!” That same voice reminds her that actually, he already had a boner from watching that movie. And that he was into what they did. 

She tries to ignore that voice.

Because Beth was into it, too. Beth was really into it. And if she listens to that voice, she's gonna remember how good she felt sleeping last night with a pussyful of cum, how little her heat bothered her until this afternoon, how much she wants to do it again.

And that's the thing—she wants to mate her pup again.

He enjoyed it. She enjoyed it. It helped her heat.

So why not a second time. 

She can use it as an opportunity to teach him more.

-----

Beth checks over herself one more time in her mirror. Her robe is closed, offering a tantalizing view of her generous breasts and the gap between them while still not showing too much. Her fur is well-groomed, tail wagging, ears perky. She's ready. She takes a deep breath, then walks to her door.

“Sammy, sweetie, could you come to Mama's room, please?” She waits, and listens to the tippy-tap of his claws across the floors. And then there he is, her wonderful, eager pup. Her tail wags harder just seeing him, smelling him.

“Come on in, baby, and have a seat on Mama's bed.”

He hops up.

“Is something wrong, Mama?”

“Oh, no baby. Nothing's wrong.” She smooths his ears. “Mama just wanted to ask you something.”

“Oh.” He perks right back up, kicking his feet. “Okay, what do you wanna ask?”

“Well,” she starts, stops, breathes. “Remember what we did together last night?”

His ears shoot up, little tail thumping the comforter in his excitement.

“Yeah! We mated!”

“That's right, Sammy. Did you... like it?”

“Yeah! I loved it! You made me feel real good, and I made you feel real good!” He's bouncing up and down, now.

“Mama—” Beth hesitates a moment. “Mama loved it, too, when we mated. You made Mama feel better than she has in many years. But I—I need more.” She takes the belt of her robe in he shaky hand and tugs. The robe falls open. She has nothing on beneath it. “Do you want to mate Mama again, Sammy?”

The pup stares at her fully-exposed body, hands lifting to make grabby motions toward her large breasts. His little penis surges up comically fast.

“Yes!”

-----

Beth lays nude on her back, legs spread to give Sammy full access to her leaking spade.

“Come here, baby, just like last time.” She draws him in, little cock finding its way into her pussy. “There you go. Good boy, Sammy.” He lays on top of her soft belly, head pillowed on her breast. She runs a hand behind his ears. “My good boy.”

“Mama you feel so good.” He grunts against her breast, begins humping.

“You feel so good, too, Sammy.” She runs her claws through the golden fur of his back. “So good.”

“I love your boobies. Can I—” he hesitates. She offers an encouraging hum for him to continue. “Can I suck on your boobies?”

“Oh, of course, baby.” Beth smiles down at him. “It would make Mama feel even better.” She guides a nipple to his muzzle, and he takes to it immediately, suckling and licking at it. “Ohhh,” she moans, “good boy, Sammy.”

His hips speed up.

She starts to feel a little something extra at the base of his little cock when he humps in—his knot is beginning to engorge.

“Wanna know something special?”

He nods and hums an affirmative, not letting go of her nipple.

“Pull back and look down at your penis, Sammy.” He does. “See that round part at the bottom, just above your sheath, getting bigger?”

“Uh huh.”

“That's called your knot, and this time, when you get close—mmmmmmf,” he shifts around looking at the base of his cock, and drags the pointed tip right across her g-spot. She takes a breath to recover. “When you get close, make sure you put that inside. That's called knotting, or a tie.”

“Like with rope! Tying a knot!”

“Just like that, baby. Such a clever boy.” She gives him a few pets, then guides him back to thrusting. “Tying is how two dogs, like you and me, show one another they love each other very, very much. Mama loves you very very much, Sammy, and I want you to tie me, baby.”

“I love you, too, Mama.” He grunts. “I think—I should probably tie you now.”

“Go ahead, baby, push your knot right in. Once it's in, it'll get stuck, and we'll be tied, and it will feel even better to finish.”

“Mama—nff.” His hips slap in against hers. “Mama I love yoooouuu!”

Then his knot slips in.

“I love you, too, Sammy.” Beth fights not to cry. “I love you so much.”

“It's stuck, we're tied!” He gives a few frantic, shallow thrusts.

“Yes we are, baby.”

“It's—It's coming!” He bottoms out, body going rigid.

“Give it all to Mama. Here,” she guides him to her other nipple. “There you go, let go, baby, give it all—” 

She feels it, when he cums.

The pool of warmth that blooms out inside her, settles against her cervix, fills her up. It draws her over the edge, too. Her orgasm explodes inside her, pussy clenching down on his little member as pleasure joins his cum in flooding her.

She loses her fight not to cry.

It's perfect.

Her pup, her wonderful Sammy, has tied her—is seeding her, breeding her—sucking at her nipple and humping his little hips.

Between joyful sobs, Beth praises him.

“My good boy. Oh Sammy.” She runs her paws through his coat, savoring the feel of everything. Him, her, them, this.

As they come down together, Sammy releases her nipple with a pop. 

“Mama, can I sleep here tonight?”

“Of course, Sammy.” She smiles down at him. “Right here, on Mama, still tied. There you go, get comfy.” 

They sigh as one. A moment later, and he's snoring quietly. 

“Happy birthday, baby,” she whispers into his ear.

There, in her bed, with Sammy asleep nestled into her big, golden-furred breast and his puppy penis still knotted in her spade, drooling the dregs of his cub cum into her vagina, Beth drifts into pleasant, dreamless sleep.