Wicked Stepsister

"This is- is so bad… You- oh!... are really getting in- into this…" she panted. "I don't- mmh… know if little Maddie des- ah!- deserves this…"

It pissed him off. But it drove him to work even harder. Fuck you. Fuck you! He homed in on the little area that made her shake the most. He alternated flicking his tongue forward and back, side to side. His jaw started to get sore, and keeping it up wasn't easy… But the more he did it, the less Amber was able to talk. She just pushed her body further down into him, squeezing her legs a little more.

"Shit…" she whispered.

She was wet before. Now she was abruptly soaking. He ragged breathing turned into extremely short and quick gasps and pants, and Tyler felt her entire body go rigid, holding in one spot against his face. His mouth opened wider against her; he was smiling at his triumph. Take that you cunt… He began to slow his attention against her… but she made no effort to move off him. And so he didn't stop.

It was quiet for a few seconds… and then she breathed, "You're going to do that again."

XIII

Madison's pillow was soaked. Her face was glowing red from embarrassment and heat. Her breathing was heavy, her wrists and ankles sore. Becca was ruthless. She started with the vibrator on a fairly low setting, and ran it along Madison's bikini briefs over the fabric. She had never felt anything like it. Her nerves were sharper than she thought possible. It was almost better than sex, and it wasn't even direct contact. God, god, god, god. She just moaned and squirmed in the chair, almost all rational thought bleeding out of her.

She managed to catch sight of the monitor from time to time, when her eyes weren't screwed shut from the intense pleasure radiating from between her legs. Her mouth involuntarily watered as she saw her step-sister rock against Tyler's face. Hearing Amber moan from Tyler's tongue was driving her up the wall… But she couldn't concentrate in the slightest. Her body burned with jealousy, but more than anything, she was pissed that it was Amber that was coming and not… oh god he's going to make her do it again…

Becca giggled. "I know what it's like… At some point, you get so horny that… I guess anything starts to turn you on, huh? I mean… God, you have to admit… those two are hot right now… going at it like that…"

"Shhh--…" Madison tried to say 'Shut up' but that's all she could make out before her body trembled out of control again.

"Okay okay, I'll give you more. Sorry baby, but I just have this, um, little kink for teasing. I think you can see where I got it from…" she nodded her head towards the computer. "Just try to relax your body a little bit… This might kinda feel like a shock."

She pulled the vibrator away and grabbed Madison's bikini bottoms. Hooking her finger underneath the fabric, by the inside of her thigh, she slowly pulled it off to the side. "It'd be nice to just take these off, but that won't work right now," she giggled to herself.

Madison moaned as the cool air came into contact with her increasingly exposed sex. She was beyond embarrassment now. She could barely comprehend her own shame… All she knew was heat and wetness at that moment. Her eyes dropped down to watch. Becca was looking giddy as possible, inspecting between her legs like she just unwrapped a present.

"Looks good enough to taste," she suggested cutely, "But not just yet…" The sound of the vibrator's steady buzz clicked back on. Becca blew softly between Madison's legs and made her quiver. "Just tell me if you're close, okay? Promise?"

The tip touched against her naked slit, and her eyes dimmed out into a blurry tunnel vision. Her legs desperately trying to squeeze closed against it. Her hips crudely pushed forward, causing her to slouch uncomfortably in the chair. She didn't even recognize her own voice as cracked, uneven moans filled the room.

And it only lasted for a few seconds. Becca quickly drew away from her, forcing her to catch her breath and sit back up further. Then she'd give it again. Madison managed to cry out, "S-s-s-stop!" But she didn't know what she meant. She had never felt so lewd in her life, but she was dying to come. She really wanted Becca to stop pulling off of her.

The sound off the computer was largely ignored; Amber's steady yelps and coos becoming a sort of pornographic soundtrack to the room. But suddenly she practically shouted, "Yes!! Again you bastard! Make me- ah! Ah!! Fucking come!..."

Becca had just pushed the vibrator back against Madison, but was distracted by the sound and turned around to look. She watched in lust as Amber's body tensed up, her hands clenching the bedposts desperately as she ground on Tyler's face in little circles. Becca's heart pounded in her chest at the sight as she stared, watching the sight unfold, and then…

Madison shrieked from behind her.

Becca's head snapped back around to see her captive convulsing in the chair. She reflexively took the toy away, not meaning to push her over the edge. It was too late though. Madison cried out an indignant, 'N-n-nooo-f-f-f-fuck!' at the removal of the sensation, but it didn't matter.

Her pussy spasmed on its own, desperately humping against the pillow and the air against a phantom touch. Madison's whines as she came were almost pitiful. Her body's frustration at the lack of pressure between her legs filled her senses… The climax felt unjustly cheapened, even though her legs and stomach shook for far longer than any normal come she could give herself.

Becca watched on with a surprised smile. "You bitch," she laughed, "You weren't supposed to do that. I was saving that!"

Madison breathed heavily, catching her breath and her composure the best she could. As her extreme high slipped away from her, she pulled together some thought. Christ. Christ. That was good… I can't believe I just… Her eyes tilted up to the monitor. That bitch. I'm so fucked up. I was watching it… I'm- I'm…

"Don't worry," Becca disrupted her thoughts. "You're not done…"

Oh god, I can't again… She dropped her face down to Becca, watching her giddy face light up as she brought the vibrator back on. Madison wasn't a complete stranger to multiple orgasms, but they were usually a few little ones. Nothing like what she just had… Her pussy was still tingling from the stimulation. "I don't- I… I…" she sighed, not being able to make a coherent sentence.

"Trust me. I know what it's like… I'll be gentle." Becca steadied herself with one hand on Madison's leg, caringly squeezing it as she brought the toy back between her legs. "I'll start slow… I don't think it will take long though," she chuckled.

Madison's felt the fire shoot back through her body as soon as her pussy felt the contact. "Fuck…" she exhaled, struggling again in her bonds.

XIV

Amber was sitting on Tyler's lap, his erection pushed up against his shorts, between her legs. She didn't say anything about it, but she kept rocking her hips back and forth, giving him teases of stimulation. "Mmm… I have to admit, that was a lot better than I expected, Tyler… You've got me all flushed!"

He didn't know how to respond. He was still trapped, unbearably horny, his mouth coated in Amber's wetness. His mind tried to come to grips with the situation, that he just ate out his girlfriend's step-sister. How could he possibly survive this… Is there any way she wouldn't find out? Is there any way I'm ever gonna fucking come?

"You know what?" she thought out loud. "I think I even want a little taste of what that was like for you!" She leaned over, lying completely on top of him, and brought her mouth up to his. He tilted his head slightly to the side in a feeble attempt at resisting, but her lips caught him anyway.

It was not the sweet kind of kiss he was used to. She pressed hard into him, her mouth staying closed only for a moment. He allowed her to pry him open, and suddenly she was sucking on his lower lip. He heard a low moan from her, and then squirmed as she teasingly bit down on him. Before he knew it, her tongue was running along the bite, then into his mouth, forcing his to wrestle with hers. She's a fucking animal! As soon as she broke off the kiss, he uttered a shocked, "Jesus!"

Her breath felt warm against his already hot face. "What?" she asked coyly. "Doesn't your girlfriend kiss you like that?"

His bewildered look was all the answer she needed.

"Oh… How boring. Well here, let me give you something a little more familiar," and she rolled her eyes as she leaned over and gave him a quick peck on the cheek. "Is that better? Does that remind you of Maddie?"

He grimaced uncomfortably. God she's a bitch but… I'm such an asshole.

As if reading his mind, she reminded him, "Oh you're fine. It's not like you're cheating or anything. You're stuck. Who could blame you? I know I'm such a bad girl for taking such advantage of you…" She licked her lips. "You know… that kinda gave me an idea!"

She rolled off of him and got on her knees next to his legs. "I mean, since we've already kissed… We might as well figure out which mouth you like better overall. I can think of one little way to seal the deal!" She traced one finger down his stomach to the waist of his shorts. "I bet you can think of it too," she winked.

His heart sped up in anticipation. God, is she really going to do it? She began to unfasten the velcro that tied his board shorts together. The slow, steady snapping as each inch became undone made his mind race. I don't even care anymore… Like she said… I can't do anything about it. Might as well fuckin' enjoy it. It's Madison's own damn fault that we took those drinks anyway…

Amber pulled the shorts down a little bit at a time, first revealing his pubic hair. "Getting closer," she hummed cutely. The base of his cock was visible now. "The funny thing is… This probably wouldn't work if you weren't enjoying yourself a little bit!" She reached down with one hand and gently wrapped her fingers around his hilt. He flinched excitedly. "Don't worry. I know you can't help it. I'm sure… anyone would understand."

He sprung free and sighed at the relief. His erection twitched in the open, desperate for attention. She held him as delicately as possible. "My my! I could always tell something nice was hiding under there!" she stroked him up and down, just once. "But I didn't realize my little sister was keeping all of this to herself… So selfish!"

She bent over, pushing her ass out toward the front of the bed, where Tyler couldn't help but gawk. Her face hovered in closer to his cock. "How often does she go down on you?" she licked the tip of him.

He groaned and shook excitedly.

"I would hope a lot, considering how good you give it!" This time she licked along his entire shaft. "Does she finish you off?" Another long lick, this time punctuated with kisses along the middle. "Does she swallow?" She wrapped her mouth around the top inch and let her tongue swirl around it.

"Christ!" he grunted.

She let off. "Hmm… What kind of answer was that? I guess I'll have to try again!" She took him in once more, this time bringing nearly half of his hard-on into her mouth. He tried to push his hips up to force more of himself in, but she wrapped one hand around the bottom of his cock and firmly pressed down on his pelvic bone. She kept him at that state for a few moments, bobbing her head slightly, sucking with just enough force to make him moan.

He growled, trying not to give into her game. Man, just tell her what you want… What's the point resisting!? But some part of him just wouldn't let go of that tiny shred of honor he still thought he had.

Amber let him slip out of her mouth again. She took in a deep breath, "Okay… How is it so far? I don't think it's fair that I'm going through all this trouble and you aren't even giving me a hint!"

He needed more. Badly. "I… dunno. Haven't had enough to judge yet…" Did I really say that?

Her eyes narrowed as they twinkled. "Tyler, Tyler, Tyler. I think you're coming along nicely." She ducked back down and wrapped her mouth around him, pushing more than half into her. Tyler groaned shakily as her head rose up and down, her warm mouth attentively sucking on him, making him see stars.

Then a devil inside of him broke out, just for a second. "Ahh… Even M-Madison can do this…"

She made a shocked squeal around his dick, squeezed her hand firmly around the base of him, and took even more in. Oh Jesus FUCK! He was almost completely inside her… Just the slim edge where her fingers still held him and… GOD! She let go, bringing both her hands to his hips and digging her nails into his skin. He tried with all his will to relax and not buck wildly into her.

His eyes were screwed shut and his mouth hung open. I can come… I'm gonna… He felt it building up inside of him, and he clenched his muscles in expectation.

And Amber reacted.

Her fingernails dug into him even harder, to the point of causing pain. And her enthusiastic sucking stopped… her mouth slowly dragging all the way off of him, leaving his cock exposed to the air. The coolness washed over him, and the sudden shock of her not following through made him curse, "Ahh—fuck!!"

"Uh oh, I think you're getting a little too into this, Ty-ler!" she sat back up. "You weren't trying to… Trying to finish, were you?" Her body turned to the side, giving him a sideways glance of utter mischief.

He stared at her in disbelief. The more this went on, the hotter she got. Her smooth skin was flawless, her curves bending in all the right places. She was thin and lithe where she needed to be, curvy everywhere else. Her tits were full and perky, but still hung heavy… Her nipples still hard, the areolas still glistening slightly from his saliva. Her long legs and stomach emphasized everything in perfect proportion, she was just so…

"That would be very bad of you. That would practically be cheating! You're not supposed to get yourself off, you bad boy!" She smiled wickedly, her fingers lazily stroking his erection, but giving it no substantial relief. "Now. Try to concentrate! Whose mouth do you like better?"

He scowled at her, boiling with frustration. "Bitch!" he spat.

She was completely unfazed. "Aww, what's wrong? You were so sure of yourself a couple minutes ago… What did you say? Even Madison can do that!" she imitated his voice mockingly. "Something tells me you were a little too quick to judge, huh?" She squeezed his cock again, and he pushed up into her grip.

"Look at you. You're desperate. How long have you wanted me, anyway? You like my tits better. You like my pussy better. You like my mouth better. Is there anything you don't want more with me?"

Her insulting infuriated him. "Shut up, you fucking…"

She gave him a pout. "Oooh… fucking what?"

"Slut!"

Amber stared at him, some of the playful gleam melting out of her eyes. "Slut, huh?" She threw her leg over him, mounting over his lap again. "You should talk, asshole. You're the one with the girlfriend." Her hand callously grabbed his hard-on and guided it between her legs.

"You think because you haven't said much that I don't think you're begging me to get you off?" She positioned him right against her slit, which was still completely wet. "Well if you think I'm a slut, I guess I'll act the part then, stud." She said it with such derision that he couldn't help but feel belittled.

It didn't matter. He couldn't stop the sounds of pleasure coming out of his throat as she thrust down onto him, pushing him entirely into her.

XV

Madison was covered in sweat. The skin around her bonds were raw. Her muscles were sore from all the struggling, from being stuck in the chair. She wasn't even positive that she hadn't blacked out for a few seconds here and there. Despite Becca's efforts, she managed to come once more. She just wasn't quick enough at taking away the stimulation, and Madison's body quivered and gushed again, on its own.

Becca pretended to be angry, but couldn't stop murmuring to her. "God, you're so fucking hot. Watching your little body squirm like this… Jesus, you have no idea. If you could see yourself, baby… Oh-my-god I am so hot right now…"

From time to time, Madison was able to focus long enough on the computer screen to take in her boyfriend's situation. She was mortified by the raw sexual encounter going on between those two. Humiliated that she never gave him anything like that herself. Disgusted that Tyler was giving in… Horrified that she, herself, was turned on by it… Even if it was the drugs, or Becca, or whatever…

She had a brief feeling of vindication when Tyler called her a bitch, a slut. But her heart did flips when she saw Amber get on top of him. She's going to fuck him. After everything that whore has done, she's going to fuck him. But then her thoughts vaporized from Becca's renewed teasing. She couldn't focus on what was being said through the speakers anymore… Just that Amber was holding still and saying something to him.

"I am so… Fuck this, I need something too," Becca moaned. She took the vibrator away and Madison's eyes rolled to watch it go. Becca pulled up the hem of her tiny skirt and adjusted her underwear, then slipped the vibrator between her legs and out of Madison's sight. Almost immediately, she sighed, "Ahh- yesss…"

Her back arched while she sat there on her knees, her eyes closed as she smiled to herself, playing with herself. It didn't take her any time at all to start huffing in little pants. She bit her lip and muted a pleased squeak, then fluttered her eyes back open. "Yeah… I needed that," she sighed happily.

I can never use that vibrator again.

Her smile widened. "And I think I need another…" The buzz clicked on again under her skirt and she made a content moan. "What about you? I have an idea!" she moved up closer to the chair, leaning her face in to kiss Madison's thighs. "This way, we both have some fun…"

Oh no… "Oh! Ohhh…"

Becca laid her tongue against Madison's exposed pussy. She kissed her, licked her, and moaned into her. Madison's brain shut down. All she knew was the pleasure between her legs, whether she wanted it or not. And this time it wasn't a tease at all. The intensity of the consistent attention brought her off before she was even ready for it. She cried out from the sensations, begged in her mind for it to both stop and go on… Becca made her come again within a minute. And she kept licking, seeing how far she could push her.

XVI

Amber barely rolled her hips against him. He scowled and twisted vainly against the bed. She's so fuckin' wet… Why won't she just FUCK… Teasing bitch!

"How is it, huh? Finally fucking me? When did you first imagine this?" She gave him a moment to answer, but gave up. "Was it at the pool? No, I know it was before that. I know how you look at me. Was it the first time we met? Was the ever a time you didn't want me?" She flexed her fingers and put them against his abs. "Do we need to go back to this?"