Nesting Instinct

Chapter 1: An Eye for Opportunity

Amelia lies in wait in her bedroom, her breathing loud in her own ears, listening carefully for the sound of the front door. Her younger sisters aren’t home; they have after-school activities until late. Her mother isn’t home either. She’d left a note saying she wouldn’t be back between the end of work and picking up the girls—a note which Amelia had very carefully found and destroyed. The only people here for the majority of the afternoon should be Amelia herself, and...

The jangling of keys. From outside the bedroom, she hears the turn of the lock and the click of the front door latch, the tell-tale squeak of it swinging open. Her stepmother has returned from work.

Amelia was not a huge fan of her mother remarrying. At least not at first. Bridget is... nice enough, she supposes. She’s a big woman, broad-shouldered and muscular from construction work with a wide, angular jaw and her hair cropped short. Inwardly, Amelia had rolled her eyes and wondered why her mother Jade hadn’t just remarried a man, if she was going to pick such a masculine woman. Especially given the parts that Bridget was apparently packing.

That was, until she’d seen first-hand what Jade saw in her.

“Jade, honey?” comes Bridget’s voice from the entryway. “You home?” Then silence, as she apparently finds and reads the note that Amelia had carefully crafted in her mother’s handwriting. Beneath her pillow, Amelia grabs a small remote and presses a button. In her mother’s bedroom a small red light, nearly invisible nestled amidst a bookcase, flickers on and begins to record the candlelit, rose-petal-strewn bed.

The first time, it had happened accidentally. Amelia was simply coming to ask her mother for permission to go out to a party with her friends, and when she’d lifted her hand to knock, the door had been ever-so-slightly ajar. She’d stopped at the sound of her mother’s moan, frozen in embarrassment. But the crack was just wide enough for her to catch a glimpse of what was going on beyond, and that had been all it took.

The sight of her mother, beautiful and nude and riding her new wife’s frankly massive cock, burned itself deeply into her mind, unable to be forgotten. She looked like some kind of ethereal being, all pale skin and flowing dark hair, eyes squeezed shut in bliss. Through the crack in the door she could just make out the look of razor-sharp intensity on Bridget’s face as she stared, rapt, at Jade, her fingers gripping the woman’s thighs so tightly they left deep dimples in the skin.

Amelia had stayed to watch as long as she could, but there was only so much she could see without alerting her parents to her presence. So, resourceful young woman that she was, she’d gone out and gotten herself a spy cam.

The camera is a tiny thing, and nestles nearly invisible in the smallest of spaces, such as the crack between two books on a bedroom bookshelf. Through its voyeuristic lens, Amelia has since watched her parents do all sorts of unspeakable things.

She’s gotten a good sense for Bridget’s rough side; watched her stepmom take her mother callously from behind, sheathing her enormous cock in her wife’s pussy in a single, heartless thrust. She’s watched them lie side by side, her mother muffling her own groans of pleasure under a hand to keep from waking her children as her new wife plows her relentlessly in a crescent embrace. She’s watched her mother pin Bridget’s hips to the bed as she greedily devours the woman’s cock, her delicate, pale hand shoved all the way up her wife’s pussy at the same time.

They both like it harsh, it seems. The thought makes Amelia drool.

She opens the app on her phone to look at the video feed. She watches Bridget enter their bedroom, taking in the romantic atmosphere and the black blindfold laid out carefully on the pillow. Bridget looks again at the note, still in her hand. Her lips quirk in a half-smile as she sits on the bed. With an indulgent expression, she quickly shucks off her sweaty work clothes and puts on the blindfold, lying back on the blankets and getting herself comfortable.

“Alright Honey,” Amelia hears her say, tinny through the camera’s tiny microphone. “I’m ready for you.”

And ready she is indeed. Amelia can see the eager bow of her stepmom’s dick, tall and ready, sensing imminent pleasure. Amelia turns the feed off, quickly divesting herself of all of her own clothes.

She tiptoes to her own bedroom door and swings it open carefully, silently. Then, with a deep breath to steel herself, she approaches her parents’ room.

She does not attempt to be silent entering the room. Bridget’s head turns to face her, but the blindfold is on well and good; she can see nothing.

Amelia approaches the bed and sets a knee up on the mattress, shifting her weight up and over. At seventeen, she’s not entirely dissimilar from her mother in size and weight. She has the same slim hips, the same long hair and large breasts; hopefully it should be enough to disguise her identity.

She’s also been paying very careful attention to the way her mother touches Bridget, and she does her best to emulate those touches now. Sitting herself between Bridget’s legs, she takes a moment to simply gaze upon the woman’s impressive cock, practically drooling for want of it. She reaches her hands out and rubs them up and down the sides, practically purring as she revels in the silky-soft skin.

Bridget gasps and arches at the first touch, but the note was pretty clear that she should just lay back and enjoy herself, so she makes no attempt to reach out and touch. With a smile, Amelia leans forward over her stepmother’s body to caress her breasts. They don’t hang down as much as her own, not with how muscular she is, but they are quite wide and surprisingly soft, with huge nipples dominating their appearance. Amelia gives them a playful tweak, reveling in the way Bridget gasps under her.

Slowly, Amelia drags her body back down the length of her stepmom’s form, keeping as much of their skin in contact as she can. She has to bite back her own moan as she drags her nipples across the peaks and ridges of Bridget’s muscles, the slight friction stimulating them up into points.

When she gets back down to Bridget’s crotch, she makes sure to drag her breasts down either side of the woman’s member, pressing them together to pillow her stepmom’s erection in the soft valley of her cleavage. She slides up and down a little, fucking her own breasts with Bridget’s cock, and is rewarded by involuntary thrusts upwards from Bridget’s pelvis.

“Oooh, Baby,” Bridget moans. “That’s so good...”

Amelia smirks silently. Then, deciding that she’s waited long enough, she slides down a little further and helps herself to Bridget’s cock, lowering her mouth onto it with gusto.

She’s not as experienced as her mother, and it turns out deep-throating such a monstrous phallus is not nearly as easy as Jade had made it look. Amelia gags slightly the first time as it hits the back of her throat. She coughs, and feels Bridget’s hand come up to rest gently in her hair. “You okay?” Bridget’s voice sounds sympathetic.

“Mm,” Amelia murmurs affirmatively around her coughing, hoping the small sample of her voice won’t give away her identity.

“Good,” comes Bridget’s voice, a strange smugness in it. Amelia only has a second to be suspicious of the tone before the hand on her head is plunging her down, forcing the cock back into her throat with irresistible force. Amelia does the best she can to relax her throat as the large member slides back into it, gulping tiny breaths in through her nose.

Once she’s gotten over her surprise, Amelia takes the hands off of her head and pins them roughly against the bed, on either side of Bridget’s hips, hoping this communicates her message clearly: she’s the one in charge here. Luckily, Bridget seems to get the idea and goes back to lying still, letting Amelia take the lead.

Since she’s already impaled on it, Amelia does the best to swallow around her stepmom’s cock, making the best of her situation. She flutters her tongue around it and bobs her head up and down until Bridget is moaning and tossing her head back and forth.

Feeling a little more confident now that she’s gotten some control back, Amelia raises her head up all the way to the tip, sucking on it hard, before forcing it all back down her throat in one fell swoop. This actually makes Bridget cry out, much to Amelia’s thrill.

Pleased with herself, Amelia backs off, leaving Bridget’s cock bereft and weeping in the open air. She takes her hands off Bridget’s wrists long enough to put them on her knees, flattening them out so she can maneuver her own knees onto either side of Bridget’s hips, straddling her.

Bridget’s free hands roam almost compulsively to Amelia's breasts, taking one in each hand and squeezing them, almost painfully. Just above the blindfold, Amelia sees Bridget’s eyebrow wrinkle in a furrow as she frowns. “Honey?” she asks, confusion in her voice. “Are you...?”

Amelia forestalls the question by leaning back, out of range of Bridget’s questing hands. Instead, she takes Bridget’s hands in her own and rears up, looming over her, carefully positioning herself just over her stepmother’s cock.

She’s so turned on she can hardly stand it, positively gushing with slick. She can’t bear to deny herself anymore. With a strangled groan, she lowers herself down onto Bridget’s hard and waiting member.

Bridget gasps as her stepdaughter’s passage envelops her, sliding wet and dripping down the pole of her erection. In her mind’s eye, Amelia pictures herself as her mother, brought back to the very first moment she’d seen them together in this way. She pictures herself as the beautiful, ethereal creature that Jade was, and crashes down as hard as she can onto the spike of the cock inside her.

“Wait,” says Bridget, the confusion back in her voice. “Hang on, this isn’t- what are-” And then, before Amelia can stop her, she reaches up and pulls off the blindfold.

Their eyes meet. Amelia and Bridget stare at one another, Bridget’s eyes widening slowly in horror. “A-Amelia?!” she gasps. “What the fuck? What the fuck, what the f-”

Amelia cuts her off by raising herself up a little and then slamming back down onto Bridget’s cock. Bridget lets out a choked-off moan. Amelia feels the member twitch involuntarily inside her. She grins and does it again.

“W-wait-” Bridget tries again. He hand gropes uselessly towards Amelia as the girl once more rises up and slams back down, getting herself into a rhythm as she begins to fuck herself on her stepmom’s cock in earnest.

After waving around a few more helpless seconds, Bridget’s fingers come to rest on Amelia’s thighs where they straddle her hips. After one particularly vicious thrust they tighten, almost involuntarily, digging into the soft flesh.

Amelia thrills inside. She can see under Bridget’s fingers the exact same merciless dimpling on her skin that she had left on her mother’s thighs. She hopes it bruises.

With an ecstatic feeling of freedom, Amelia rides her stepmother’s cock with abandon, throwing her head back in pleasure just as her mother had all those nights ago. She revels in the slick feeling of flesh going in and out of her, in and out and in and out, sending slippery shivers of pleasure all through her hips and up her spine. She loses herself in the feeling, pounding the cock harder and harder into her opening, dripping fluids everywhere.

Bridget no longer resists, riding out the waves of pleasure just as Amelia is. Amelia looks up to see her eyes squeezed shut. Whatever she’s telling herself about this encounter, she certainly doesn’t look like she’s going to stop it. She lets out a helpless whimper that fuels Amelia’s victorious ego to new heights and sharpens her lust into unbearable relief.

Amelia speeds up desperately, feeling herself closing in on her orgasm, reveling in the thick meat filling her up, every nook and cranny. “Ohhh,” she moans brokenly, as her thrusts become a frantic gyration of deep slams, trying to force as much of the cock into herself as physically possible.

She gasps and cries out as she comes, clenching and spasming around the penetration inside her. She sits as far down on her stepmom’s lap as she can and writhes, her body desperately trying to pull more of the flesh into her with each contraction.

She’s lost in a world of hazy pleasure, adrift and helpless under the contentment that clouds her brain, when she hears her stepmom growl. She lets out an undignified yelp as Bridget surges up underneath her, yanking her up off of the still rock-hard spike inside her and flipping their positions. Seconds later Amelia finds herself thrown down onto all fours on the bed as Bridget kneels behind her and immediately forces her cock back up her stepdaughter’s sloppy, loose hole. Amelia’s eyes go wide in surprise as her stepmother begins to slam her forward on the bed with desperate, animal thrusts.

It doesn’t take long. She barely has time to say, “No, wait, st-” before Bridget is coming deep inside her; Amelia can feel the seed flooding into her body. Her stepmother grips her hips bruisingly tight and pours cum unchecked into her womb with a low and satisfied groan.

Bridget lets go when she’s finally finished and Amelia slides, exhausted, off of her cock and onto the bed. Moments later Bridget collapses half on top of her.

“What the fuck?” she whispers, her voice hurt. “Amelia, what the fuck was that? What the fuck am I supposed to tell your mom?”

Amelia smiles. “Nothing, if you know what’s good for you. Unless you want her to see video footage of her poor, helpless daughter getting dicked hard by the wife she thought she could trust.” Footage that Amelia herself is very much looking forward to watching later. “Thanks for that little show of force at the end there, by the way. That’s definitely just the clip I needed.”

“Fuck you,” Bridget hisses, angry.

“Oh, definitely,” Amelia says, smug. “Happy to oblige if you want another round sometime.”