I convinced my (step) sister to make me cum – [MF]

“I need a guy’s opinion,” Summer says. It is 8:41am on Monday of the long weekend and she’s leaning into her brother’s bedroom.

Tyler opens his eyes and drops his headphones to his neck, which pauses the music automatically. “Huh?” He lays back on a beanbag chair, cooling off after an early morning bike ride, still wearing his bike jersey and shorts.

“I said,” Summer rolls her eyes, “I need your opinion. But don’t be all pervy about it.” She’s still in her sleepwear — cotton shorts and an old band tshirt that’s seen better days.

He grimaces. “What are you even talking about?”

“I can totally see your dick in your pants, you know,” she says, walking in to his room and tapping on her tablet, snug in its pink girlish case.

“And I can see your nipples in your shirt,” he says, “So we’re even.”

“Gross, Ty.” She crosses an arm across her chest, covering herself. “Why are you looking?” She sits on the beanbag. “Move over, you’re hogging.”

As he scoots over, making space, he chuckles. “Why are you looking at my dick?”

“Ty!” she scoffs, “It’s not my fault. You’re, like, presenting it to the world.”

“The world ain’t in my bedroom, Summer,” he says, “Just you are. And if you want to see my dick, all you gotta do is ask.”

She shakes her head. “Why are boys so gross?”

“Is this what you wanted to talk about?” he says, thrusting his hips, “My dick?”

Summer rolls her eyes. “I got the photos back. From Antonio, you know?”

“The headshots?” Tyler says, leaning in to see the screen better, “Did they come out good? Are they gonna work?”

“Yeah!” she says, full of enthusiasm. Then, less sure, “Yeah, I think. Well. I mean. That’s why I want you to see. Why I need a guy’s opinion.”

On screen, there is a grid of photos, each featuring Summer in a different pose, all head-and-shoulder portraits. Some, she’s smiling at the camera, in others she’s looking away, as if caught in the moment. Her blue eyes are piercing, her hair and makeup perfect, cheekbones high, lips plush, and her skin is tanned and flawless and smooth. In the images, she’s confident in her cuteness.

“These are really great,” Tyler says, “Antonio’s a pro.”

“You don’t think they’re too, like… I dunno,” Summer says. She scrolls down, more images come into view.

“Uhhh…” Tyler blinks, muttering, “Holy moly…”

The new photos are body shots — Summer in profile, Summer sitting on a chair, Summer laying on a bed, on the floor, Summer’s back to the camera, legs crossed. And in the photos, sweet little innocent Summer is wearing a gray lace bra, matching thong, and nothing else.

“The agent asked for this?” Tyler reaches out, scrolls more. Images come into view, Summer’s expression growing from friendly to flirty, from flirty to seductive. And that’s for the photos that show her face at all, more and more of the images focus on her body, on her figure. On her thin waist, toned abs, perfect skin. Her round ass, long legs, heavy chest. “I thought you said it was a legit modeling agency,” he swallows, “But these look like you’re trying out for por–”

“Ty!” Summer cuts him off, “I said don’t be a pervert! I’m not doing that.” She emphasizes the last word, weighting it with meaning.

“Yeah, well,” he protests, “These just… are, um, sexier than I think they need.” He taps on one of the images, enlarging it to fill the screen. In it, Summer’s laying on her side on a small couch, looking at the camera with bedroom eyes, hand resting against the side of her breast, the curve of her figure an hourglass. Her nipples peek through the translucent fabric, her pussy hinted at beneath the thong. Tyler mutters, “Fuck, that’s hot.”

“That’s what I needed to know,” Summer says, cheeks warming, avoiding his gaze, “They said I should be ‘alluring,’ but this is too much, right?”

Tyler turns to her. “How did this happen? You didn’t realize how these would look? Did your clothes just accidentally fall off?” He swipes through more images, stops at one of Summer on a chair, kneeling. Her knees are spread, her pussy mound is unmistakable. He zooms in on her crotch. The photos are high-resolution, filled with detail. Summer’s thong fills the screen. Tyler grins. “Nice.”

“What? Rude! Gimme that!” Summer reaches for the tablet, frantic to zoom back out, but Tyler holds it away. “I just… I got carried away, don’t be–are you getting a boner!?”

He swipes to the next photo. “Look at your ass, hanging out like that. Was Antonio getting turned on when he was taking these? Was his dick hard?”

“No! What? He was a professional. Do you think I fuck every guy who comes along? Is that why you’re getting hard, you’re imagining Antonio’s cock driving into your baby sister?”

Tyler stops on another photo. “Jeeze, Summer. Gotta say, your tits look fucking amazing here.”

“If you say so.” She tries to suppress a grin.

“So, what, you made porn, and now you’re embarrassed?”

“It’s not porn!”

“Sure feels like porn.”

“It’s not porn!” she repeats. “What–are you touching yourself?” Summer looks shocked. “Are you really fucking jacking off right now? I can’t fucking believe you.”

“Relax,” Tyler says, pulling his hand out from under his waistband. “I was just adjusting myself.”

“But– you’ve–” she shoots him an incredulous look, “You’ve got a fucking hard-on. I can see the shape of your fucking circumcised cock poking out at me.”

His dick is substantial, and despite his growing erection, the shorts are pulling it tight against his hip. “Yeah? Why don’t you go down there, take a closer look?” He grins. “Say ‘hi’ to my balls while you’re at it.”

She rolls her eyes. “Gross.”

He stops on another photo. “Holy shit, Summer.” She’s sitting on a dining chair, back to the table. Her bra is off, her tits cupped in her hands. In one hand, her fingers are spread, her nipple peaking out between index and middle. Tyler turns to her. “You got all the way naked?”

“I’m not naked in these!” she objects, “I’m still wearing panties.”

He eyes her thong. “That’s being generous.”

He swipes again. Summer’s still on the chair, now leaning against table, shoulders back, chest pushed out, arms outstretched. Her tits are large, pert, on full display. Her gaze is piercing, confident, eye fucking the camera.

“Oh, hot damn,” Tyler mutters.

“Gimme that back!” Summer squeals, scrambling for her tablet, but Tyler wrenches it away. “You weren’t supposed to get off on this.”

“You sure about that?” Tyler flashes his tongue at her, “Hah, look, the scroll bar’s barely even halfway. What else did you do?”

“No!” she yelps.

But Tyler scrolls onward. Images slide across the screen, Summer with her legs spread, Summer pinching her nipples, Summer petting her crotch, Summer with her fingers under her thong, Summer biting her lip as she touches herself, Summer pinching her eyes closed in ecstasy.

“Oh. My. Fucking. God.” Tyler turns to her, eyes wide. “Well this is filling in some gaps in my fantasy.”

“What?” Summer eyes bounce from the screen to her brother and back. “Fantasy?”

“I can hear you, you know, at night, through the wall, when your vibrator’s buzzing away. Always wanted to sneak a peak, see you masturbate.”

“What? That’s so… But– but…” she stutters, “But you’re my brother.”

“Summer. I met you when I was fourteen. Be real. I’m your step brother.”

“So?” she says, “That’s, that’s–”

“That’s not quite the same thing, is it? You gave me boners back when we were fourteen, and you’ve done nothing but get hotter since.”

“I’m still your sister!” Summer protests, “I can’t believe what a pervert you’re being right now.”

“Oh, give me a break.” Tyler waves his hand in her face. “You’re always flirting with me, sending me selfies in bikinis and stuff, coming in the bathroom when I’m taking showers, saying stuff like ‘I can see your dick through your bike shorts.’”

“But that’s just–” she starts, “That’s just me having fun.”

Tyler shakes his head. “Kind of perverted fun, don’t you think? Teasing your brother. And now, here you are, showing me porn of yourself, surprised that it’s giving me a fat stiffy.” He grabs her wrist and places her palm on his cock.

“What? Ohmigod. Why’s it so big?” She sucks in a breath. “I can’t believe I’m touching your dick. What the fuck.”

Tyler turns back to the tablet, swiping again. A new photo fills the screen, Summer on her knees, ass up in the air, tits and face pressed against the ground. The thong is pulled down mid-thigh, she is wantonly masturbating.

“Fucking hell,” Tyler says, “All this, and you didn’t even give Antonio a courtesy jerk. You’re a bigger tease than I thought.”

Summer looks sheepish, averts her gaze. “Well, I mean, I just said, like, I didn’t fuck him.” Her fingers slide across Tyler’s shorts absently, stroking his cock as if its the most natural thing in the world.

He grunts. “What does that mean? What did you do?”

“Nothing,” Summer says, “I was just feeling horny, all right? He didn’t say anything at all. But I knew he wanted it.”

“Didja jerk him off?”

“No,” she shakes her head, “Not that.”

“Then what?”

“I, like, went down on him, I guess,” she says. Then, “Gross! Did your dick just get harder?”

Tyler groans, wraps his arm around Summer’s shoulders and pulls her close to him. Through her thin t-shirt, her tits squish against his side. He watches a nipple slide underneath the fabric. “You’re not even touching it. Not really. Why don’t you reach in there, give me the real thing?”

“You’re disgusting, you know that?” Summer pulls her hand away, then pushes it down, under his waistband. Her fingertips make contact with the hot flesh of his dick, then slide past, wrapping around his balls. “Antonio was a gentleman, you know? It was all me. I went up to him, knelt down, pulled his cock out, and started sucking. I knew he wanted it. He didn’t have to say anything.” She pauses a beat. “Why are your balls so big? Do you not jack off enough or something?”

“Did you swallow his load?”

She scoffs. “Yeah, of course. What’s the big deal with that? What else was I going to do with it?”

Tyler slides his hand down from her shoulder, resting his fingertips on his sister’s breast. He feels the soft, supple flesh beneath as he run circles around her nipple. “Coulda let him spray it on these tits.”

She clicks her tongue and shakes her head. “You boys.” She sucks a breath as he tweaks her nipple. “What the hell are you doing?”

“Just having some fun,” he says, smiling at her mischievously.

“Ty!” she says, “You’re being ridiculous. We’re not going to fuck.”

“I know.” His other hand is reaching over, rubbing her between her legs. He presses into her, pushing her shorts up, between her pussy lips.

She gasps and takes her hand off his dick. “You need to get laid, Tyler.”

“I know.” He pulls her over until he’s spooning her. Her head is beside his, her ass against his crotch.

She rolls her eyes. “I mean with someone else.”

“Which panties are you wearing?” he says, fingertips caressing her pussy lips, massaging her sex.

“What? I’m not…” she starts, “Why? Ty, why are you touching me like this?”

“Like what?” he coos into her ear.

“Like,” she bites her lip, “You’re going to make me wet.”

“You made me hard,” he says, “I’m just returning the favor.” Through her shirt, he squeezes a breast. His other hand slides underneath her shorts, feeling her soft skin, her hot sex.

She gasps, moans. “But I’m your sister.” She nuzzles into his arms, wiggles her ass into his crotch.

“So?” He teases her clit.

“So it’s not right,” she nuzzles her shoulders into his chest.

“What’s not right?” His fingers slide up inside her. “Am I not doing a good job?”

“No…” she moans, “I mean, yes, I mean, I don’t know. Yes. You’re turning me on.”

“Good.”

She’s panting, her chest heaving. “I can’t believe how gross you’re being right now.”

He pinches her nipple.

“Ahh–” Summer gasps, “Fuckkkkkk.” Between heavy, sucking breaths, she mutters, “You, are such, a fucking, pervert.” Her eyes are squeezed closed.

“So are you,” he says. She shudders, and his mouth brushes against hers.

She presses her face against his, locking lips, shooting her tongue into his mouth. It’s a frantic, desperate kiss, full of need and desire. She moans into his mouth, guttural sounds matching the pace of his fingers in her pussy.

“This isn’t right,” her words come, hot breath hissing out against Tyler’s face. His hand is a blur of motion beneath her shorts.

“Cum for me, Summer,” he instructs.

She squeals. Her pussy spasms. Waves of climax shock through her. “Ok, ok, ok,” she groans, “I can’t… you need…”

But Tyler continues, pressing his fingers into her, finding more pleasure not yet tapped.

In a breathless, high pitched voice, she shrieks, “What are you–?” She grabs Tyler’s wrist, pinches her legs together. She jolts, her back arching as the orgasm explodes inside her. “Oh fuck, oh fuck…”

He starts to pull away, but with her hand on his wrist, she shoves his fingers into her crotch. “Don’t stop,” she demands, shuddering.

Tyler stifles a laugh. “Ok.” He massages her clit, hard. He feels her pleasure surge in her breathing, her convulsions, in the noises escaping her throat.

“Put your fingers in me,” she instructs. Tyler does, and she writhes and bucks, grinding against his hand. “Yes,” she screams, “Fuck, that’s so good.”

His fingers fly over her heat, testing her reactions, until he finds her special spot. She throws her head back — Tyler just manages to dodge — and she wails a wordless, guttural cry. She turns to look at him, an incredulous look. “I never expected…”

Summer pulls his hands away and collapses, catching her breath.

But Tyler’s impatient, and pushes her hand to his dick. “Touch it,” he says.

She rolls over, lies on top of him, face to face. Their eyes lock. She grabs his erection, feels its heat, the wet spot that’s formed at the tip. “So fucked up,” she says, softly.

She begins stroking him, watching him react, his eyes glazing over as her soft palm massages his shaft.

“Go down,” he mutters, pushing her.

She rolls her eyes. “I can’t believe I’m doing this,” she says quietly, like she’s talking to herself. She slides down until her face is level with his crotch. She pulls his shorts down, watching as his hard dick springs up in her face. She eyes the erection warily, shaking her head.

“C’mon, Summer,” he says, “Don’t be a tease.”

“You’re degenerate, you know that?” She smiles at him, placing a single fingertip on his dick and pushing it to the side. A withdrawn finger, and his thick erection bounces back into place. Her mouth is open, she’s sliding her tongue against her bottom lip.

“Oh,” he groans, “I need it.”

She gives him an incredulous grin. “You don’t ‘need’ it.” She wraps her hand around his shaft, gripping its base. “It’s not like you’re going to die without it.”

“Yeah I will,” he says, “I’m going crazy.”

Summer stokes his cock, one pump, two pumps, three. “You’re so gross,” she says, rolling her eyes, “You’re my brother.” She sticks out her tongue, curls it around his glans.

He shudders. “Oh… fuck…”

“Geeze, Ty. I think you just got harder.” She strokes him faster, dropping her mouth to suck on his balls.

He moans, loudly, head rolling back on the beanbag.

With her free hand, Summer tucks her hair behind her ears. “This is what you tell your girlfriends to do, right?”

He whimpers as she purses her lips on his sac, sucking a nut into her mouth. Then she takes the other, her nose brushing his dick. They make eye contact, and she grins at the ecstasy on his face.

“You’re too fucking easy, Ty. You’re already gonna pop, aren’t you?” she says, then returns to his balls. She strokes and sucks, slurping away as he groans. Her thumb rubs his glans, coaxing out more and more precum, smearing it all over. Her lips tug on his balls while her tongue caresses them, popping them in and out of her mouth. Her grip tightens around his shaft, and he squirms, but she has him under firm control.

He doesn’t want to cum yet. “Show me your tits,” he says.

Summer pulls off him, smiling despite rolling her eyes. “Figured this was coming. Pervert.” She leans back and pulls her tshirt off. Pert, round breasts spring free, and Ty stares, jaw slack. She sees his reaction and shakes her head, grinning and cupping them. “They’re just boobs, Ty.”

“I wanna fuck em.”

“What?” Summer furrows her brow, “Like in porno?”

He grunts, “Just do it.”

“Uh, ok,” she hesitates, then leans down, placing his dick between her breasts and squeezing. “Like this?”

“Yes.” Tyler grunts, thrusting his hips, sliding his cock up against her soft skin.

She rubs her tits on his dick, watching, studying. She’s fascinated by how much he seems to be enjoying. “Jeeze, Ty, your balls are really tensing up.” She looks up at him, sees his eyes have rolled back in his head.

“Oh,” she says as the first jet of spunk grazes her chin.

Tyler groans, another rope shooting up, dripping down on Summer’s tits. Another jet, then his cock oozes cum, thick white spunk dribbling down his sister’s chest.

“Lick it up,” he says.

“Gross!” Summer exclaims, “No. What’s wrong with you? I’ve got to go get this cleaned up before Mom and Dad start wondering where we are.”

Source: reddit.com/r/sexystories/comments/sv1hb7/i_convinced_my_step_sister_to_make_me_cum_mf