Bursting out of her shell.

The car ride home with your busty sister is pure ****. As soon as she's in the car, her towel is tossed into the backseat and her seatbelt is pulled across her chest, finding a natural home deep in her cleavage. It makes her full, practically naked tits look even bigger and you groan as a wisp of a Cheshire's smile tugs her lips upward. She knows exactly what she's doing and, despite denying being a tease just minutes ago, she does her best to distract you as you reluctantly try to keep your eyes on the road.

It's the small things that get to you. A subtle hand resting on your thigh as she talks about her day. The wide-legged pose that spreads her thighs enough to give you a perfect shot of the light blue bikini bottoms barely covering her sweet pussy. Her hard pokies forming perfect circles under the surface of her top. And the constant jiggling of her titflesh every time you hit the slightest bump in the road--you make sure to search out and find every pothole between Scarlett's house and your own.

By the time you pull into your driveway, you've got another raging boner, so hard that it hurts. Shelly takes one look at it, gives a little giggle and jumps out of the car, racing toward the house. Your hand drops to the release button on your belt, slips. You give a shout of frustration and try again, finally catching it before swinging your door wide and chasing after your sexy sister.

She pulls the front door open and disappears inside laughing even harder. Her laugh turns into a squeal of pleasure as you catch her a coupe of steps into the house, wrapping your arms around her slim waist and lifting her into the air. You can feel her nubile body writhing in your grip, adding fuel to your erection. Remembering how much she said she enjoyed you taking complete control earlier, you have every intention of dragging her into your bedroom, throwing her onto you bed and giving her every inch of your cock until your balls are completely empty. You fully expect that to take three or four heavy orgasms, at the very least.

"Well, aren't the two of you in a good mood!"

Your mother's voice cuts through the lust-filled haze that wraps up both you and Shelly. You guiltily set your sister on the ground and, giggling dying out, you both turn to your mother...and find her standing in the entrance to the living room, smiling and wearing a skintight yoga outfit.

You can practically hear your dick cry out as you take in her lush, mature body. Her blonde hair is piled atop her head in a messy ponytail and her face is flush from her interrupted workout. Her breathing is deep, and the heavy-duty sports bra holding in her giant rack is working overtime to prevent their release and her stomach is looking smoother than it has in years. Grey yoga pants hide nothing about her legs and you thank every god you can think of for creating the fabric that allows for such leggings to exist. Even Shelly is captivated at the sight of your mother, her baby blues working tirelessly to drink in every curve.

"Yeah," you finally manage to respond. "Scarlett invited us over for a swim in her pool." You lamely wave your hand at Shelly's tiny bikini as if that explained everything. "We had a real good time, hanging out together. You know, talking an swimming and stuff."

Man, I wish my dream powers could make me more of a smooth talker, you think with an inward sigh.

One of her cheeks twitches. "Oh, okay," she says with a tiny shake of her head. "I thought maybe the two of you had been...." She lets her words trail off and you realize that she had been thinking that the two of you had been fucking. And she didn't seem overly concerned about it

Shelly throws on her most charming, thousand-watt smile. "Nope. Just some normal teenage fun!" She distinctly fails to mention the blowjob at Scarlett's or her very un-sisterly taunting in the car. "Are you working out?" she asks, nodding her head at your mom's outfit.

Your mother waves her hand in embarrassment. "Yeah," she admits with downcast eyes. She coughs, having a hard time getting her words out, unsure of herself. "After this...after this morning, you know...when I saw you guys naked and all, and how good you both looked, I decided to get back in shape myself. Lose some of the extra weight I've put on." She lifts her chin, finding both you and Shelly with her gaze as she forces out her next sentence. "Then maybe, I'll also find some who will...."

Her words die out and an awkward tension fill the space between the three of you. Images of this morning, you and Shelly caught in flagrante delicto by your mother, the escalation when Shelly invited her to join you on the bed, the brief contact of your mother hand on your dick, flash through all of your minds. You feel something building and you know, if you don't handle the situation right, everything will fall apart. But the only thing you can do is blurt out the first words that enter your mind.

"Fuck you silly?" you say, completing your mother's unfinished sentence.

The moment hangs on a razor's edge. And then bursts, with all three of you erupting in gales of uncontrollable laughter as all stiffness and embarrassment washes away. Shelly bounds to your mother and throws her arms around your mom's shoulders, pulling her close and giving her a loving kiss on the cheek. Even in this inopportune situation, you can't help but admire and compare your female family member's bodies as the press against each other. You hope it's true what they say, that you can tell what a girl's going to look like when she's older by look at her mother. Then Shelly's going to remain a busty fox for decades to come.

"Oh, mom, you're absolutely gorgeous," Shelly gushes. "And you've got a great body!" Your sister takes a second to spin your mother around in a circle, showing off her matronly charms. Shelly shoots a knowing glance in your direction. "I'm sure we'll be able to find someone who'll be able to help...spice up your love life. Until then, how about I join you with your workout. I haven't done yoga in a few days and I'm beginning to feel it myself."

Your mother beams at her daughter with love and a little bit of relief. She rubs Shelly's bare arms with a gentle caress. "Sure, that sounds wonderful! I'll let you get changed and I'll head back to my workout." She gives your sister a surprise peck on her lips and then returns to the living room.

You open your mouth to give Shelly a small piece of your mind. Your cock is still hard and you won't be able to fuck her right away if she's going to join your mother for some yoga. But Shelly gives you a hard look and brushes close to you as she moves toward the stairs leading upstairs. In a quiet whisper, only for your ears, she says, "Get your ass into the living room and sit down on the couch."

You should have known. Your sweet, scheming sister has something planned and you're not about to complain. Her devious mind never seems to stop considering how to turn a normal situation into some sexy fun. It's one of the things you absolutely love about her.

Following her instructions, you get your ass into the living room and sit on the far side of the couch, which offers the best view of the rest of the room. You're not one-hundred-percent sure what Shelly is thinking, but you want the best position possible. Your mother shoots you quick, almost shy glances as she continues her workout, using her floor mat to stretch and contort her body into yoga poses--designed to enhance strength and balance--that does fun things for your already throbbing meatstick.

Shelly must have set a record time changing into her yoga gear--not that she had been wearing much with that bikini to begin with--as you only get maybe a minute of viewing pleasure before she bounces into the living room. Both you and your mother do a double take as she enters. In most ways, she's a twin of your mother: black yoga pants that are almost like she's wearing nothing on her lower half and a ponytail held back by a blue hair-tie. But her top is very different. Whereas your mother is wearing a full sports bra with no hooks or clasps, Shelly's top has a zipper in the front and it's being held together by only a couple of metal teeth. The rest of it is split wide open, so that her bountiful breasts are in constant danger of leaping free.

You hide a smile as Shelly struts in, intentionally ignoring the looks she's getting from your mother. Your mom clears her throat. "Uhmm...didn't you get some new tops a few days ago. That one doesn't look like it fits very well."

Shelly shrugs, stretching her top to its breaking point, causing her tits to bulge almost as much as your mom's eyes. "This was the first one I could find and didn't want to keep you waiting. It'll be fine. Why don't we get started?"

Shaking her head in mild exasperation, your mother takes her place on her yoga mat and starts the process of centering herself. Your sister's wardrobe is a constant distraction, however, and you catch your mom her sneaking peeks in Shelly's direction. Most of them are targeted at your sister's skimpy top and the mountains of flesh barely held back, but a few aim lower to where her shapely ass and legs are displayed. It throws her off balance and she has to catch herself a couple of times before she's ready to begin.

You hold no such qualms and openly leer at your sexy sister and her stupendous workout outfit. Watching her titties jiggle uncontrollably beneath her small top makes you even harder, you recommit to dragging the slutty little minx upstairs and fucking her senseless once the yoga session is complete.

You don't skimp on ogling your mother either. Despite wearing what normal people would consider fairly standard yoga gear, she's still showing a considerable amount of delectable flesh and the additional changes you've made to her in the dreamworld has helped firm and tone up her entire figure. As Shelly calls out and directs their poses, you get an up-front and personal view of your mom's own sizable rack, sitting high on her chest, her sports bra offering an appetizing down-blouse shot of her deep cleavage while accentuating a flatter stomach than she's had in years. But your heart almost stops when, in classic 'downward dog' position, you find yourself greeted by two identical, very distinct, camel toes. Twin pussy mounds push through the thin fabric of the yoga pants, every curve perfectly defined and you have to squeeze your cock, hard, to prevent a premature explosion.

As they continue their exhibitionist yoga performance, you realize this may be the sexiest show you've ever witnessed. Certainly better than the few skeazy dancers you've seen at the local strip club and on par with some of the A-list porn scenes you've found online. You'd bet that there would be thousands--hell, millions--of guys who would love to be in your position, watching a hot MILF and her even hotter teen daughter flaunting their bodies as they bend into improbable, acrobatic forms. Fuck, I bet most of them would pay for this view, you think, wheels turning.

Your attention snaps back to where it rightly should be, when the inevitable happens. With a metallic twang, Shelly's top rips apart as she thrusts her chest forward just a hair too far. Both boobs pop free and careen around wildly for a few seconds before they calm down and settle in place, fully exposed and beautiful. Her nipples are swollen and pointed, a fact not lost upon either you or your mother.

Your sister looks down at the metal zipper and shakes her head. "Completely broken," she says with a cluck of her tongue. "Oh well." Acting as if nothing's wrong, she shrugs the ruined top from her shoulders and tosses it to the floor next to her mat. Then she returns to her previous pose and holds it, now completely topless.

Your mom clears her throat. "Do you want me to wait while you go grab another top, honey? I don't mind." Her face is flushed and you get the impression that she wouldn't overly mind if your sister didn't, either.

"Nah, it's okay," Shelly replies, rolling her shoulders. Her breasts bounce up and down lewdly. "It's actually quite freeing." A pregnant pause. "Why don't you join me?"

Your cock lurches inside your pants and you bite your lower lip as you await her response. Please, please, please!, you silently cry, hoping her time in the dream world and the nudges you've given her in the real world has been enough to alter her psyche to the breaking point. She's grown comfortable with a level of naughty exposure with her clothing: the silk robe from yesterday morning and last night, and her lingerie when she interrupted your blowjob this morning. Is she ready for the next step?

It only takes her two seconds to decide.

"Okay," she says simply. Her cheeks darken even further as she grabs the bottom part of her bra and pulls it up over her head. Unintentionally, the band catches on the lower slopes of her motherly mounds, lifting them almost to her chin before they spill free in a tidalwave of titflesh. They have a bit more sag than Shelly's but they're topped with deliciously pink nipples that have swelled to perfect peaks, like ripe cherries on the crest of a vanilla sundae. Size-wise, your mom might have a slight advantage over her daughter, but you'd hate to live on the difference. She turns to you belatedly, her top already discarded, and says, "As long as your brother doesn't mind."

Shelly gives a throaty laugh and slides in behind your mother, until both pairs of tits are lined up in a nice neat row. "Judging from what he's trying to hide in his pants, he approves of the change." You nod and your sister leans in even closer, her breasts pushing into your mom's bare back and upper arm. "He's been staring at you the entire time we've been working out anyway. Might as well tease him a little bit."

"Oh please," your mom says, shaking her ponytail. "He's been watching you." Behind her, Shelly mouths the words 'take out your dick.'

Grinning at the turn of events, you unzip your pants and your cock roars free like a leviathan. Your mom had a chance to see it up close and personal this morning, but you can tell it's even larger and thicker than before, due in no small part to her sexy performance. As it stands proudly from your crotch, Shelly flashes her teeth in mute support while your mother stares at the beast with unadulterated desire. You actually see her nipples stiffen even more, their pebbly surface growing before your eyes. She was fine with exposing herself to you, but now that you've exposed yourself to her, she seems to have gone into a bit of shock.

"It's true, mom," you tell a little white lie. "This is all because of you. Shelly's right, you've got an amazing body and you shouldn't have to hide it as much as you do. You're gorgeous and I can say with absolute honesty you'd give Shelly a run for her money in a contest for the most hottest woman I know. I get hard every time I see you."

Shelly places a hand on your mother's arm and rubs it gently in an almost hypnotic circle. Her voice is quiet. "See? I told you so. You have the figure and ability to drive a man wild. You deserve a man who appreciates your best qualities and helps you get past your weakness. You deserve a man who tells you how sexy you are. You deserve pleasure. You deserve to have a man who is maddened just by the sight of your tits. You deserve to get fucked every day by a man who loves you and desires you."

With each sentence your sister gives your mom a little nudge, moving her forward until, by the end, they're standing directly in front of you. Your mother's breath quickens at the nearness of both her children and you can see her trying to hold herself back, but her mouth is dry and she can't turn away from your giant hardon.

"That's who my brother is to me and I love him like no other," Shelly continues in her breathy monologue. "I'm happier than I've ever been, thanks to him. And I like to think that I've made an enormous contribution to his happiness as well. We're better, stronger, more complete when we're together. Don't you want to feel that to? To have some who makes you happy? To have someone, like my brother, who desires your body? To have some, like your son, like me, who will hold your love and your pleasure paramount?"

"Yes."

It's so faint, you can barely hear your mother's response. But her head also nods and Shelly envelops her in a hug from behind, crushing her body against your mom's shapely form.

"Then let us show you the possibilities," Shelly whispers. She settles on her knees, drawing your mother meekly down until your looking directly into her eyes. Lust has claimed them but can see a light of understanding and commitment that signals her willingness to continue. She inches forward and reaches for your trembling dick, wrapping it in her fingers like she did this morning. This time, though, she just holds it, marveling at its warmth and girth. Your sister encourages her. "Go on, tell him what you want."

"I want...," she starts before her voice cracks. She takes a deep breath and tries again. "I want to feel you...between my...breasts." She gives a tiny smile, perhaps the first true one you've seen from her in a very long time. The first step out of the way, a bit of confidence suffuses her and she says a bit louder, "I want you...to fuck my tits."

"Perfect," Shelly says and you can do nothing but agree with that assessment. She reaches around to cup your mother's heavy melons and gives them a loving squeeze as she helps settle them to either side of your large pole. Your sister lets them go, deferring to you, and you press your mom's tits together until only the tip of your shaft is protruding from their soft embrace. It feels heavenly. You've had her sweet mammaries wrapped around your cock in the dreamworld but this feels even better. There, you're the master of the domain and your word is law; here, you're the same as every other guy and the taboo of having your mother willingly submit--no, beg you for a titfucking--adds to the eroticism of the whole affair.

Knowing that you won't last long, you bounce her fat titties in your hands, sliding their sweaty surface up and down your shaft. She moans and momentarily closes her eyes to revel in the feeling of having her son's dick thrusting between her velvety curves. When they open back up, her pretty blues are lit with hunger and she begins to move her upper body, aiding in your movement and ensuring that your meatpole is plumbing every inch of her generous valley. Her nipples are hot, burning into your palms as you pound away.

Your mom squeals, her mouth dropping open in shock and surprise. Unable to sit back and watch, Shelly has moved to your mother's left side and pressed in close until her face next to your mother's and you can see some movement from her upper arm, but most of the action is blocked by your mother's body. Judging from your mom's reaction though, you suspect that your sister's right hand has found its way between your mother's legs. You'd love to know whether they're outside her yoga pants or if they've wormed their way beneath the fabric and are invading your mom's hidden snatch, but it seems like an inopportune time to ask.

"Oh fuck, mom, your tits are fucking amazing. They're going to make me cum!" you give a quick warning.

"Yes, yes! Do it, please! I haven't felt like this in forever!" She leans forward and traps your cock in place, her eyes glued to the tip.

The first shot of jizz is surprisingly weak, falling almost immediately onto her busty slopes. It's just a precursor for the flood. The rest of your orgasm rips free like a cannon, each string rushing out as if they were trying to win a race. Your mother's chin is the first casualty but there's more than enough left over for most of her neck and both boobs to be completely smothered in her son's creamy goo. But she barely notices.

Your sister's fingers have worked their own magic and your mother jolts upright, globs of semen dropping from her face to splash in the pools forming on her chest. You let her go, allowing her body to move and thrash as much as it needs to let her orgasm out. She looks beautiful in her throes of passion and you hope to give her repeat experiences shortly.

As your mom comes down, your sister lifts her right hand and looks at her first two fingers, dripping with your mom's pussy juices. She wiggles them in your direction, a wide grin on her face, and you laugh quietly. Your mother picks up her head and eyes the pair of you, her own smile brightening her messy face. There is no awkwardness, no feeling of regret among the three of you. Perhaps just the question of what's next.

You open your mouth to crack a joke.

Then you all hear the garage door begin to open.