Four Arms, Two Dicks (Ben 10)

A/N: Four Arms, Two Dicks was a P atreon Poll Winner originally written back in 2019, posted to HF in the beginning of 2022, and now posted here for people to enjoy!

Themes: Alien Sex, Double Dicks, Rough Sex

-x-X-x-

Her phone buzzes, and Gwen turns over to reach out and grab it. The moment she does, there's a fat cock draped over her ass, and she has to growl right as she's answering the call, speaking back over her shoulder.

"Stop it twerp! I'm on the phone now!"

Ben doesn't actually say anything, but there's no denying that he's basically ignoring her, his hands groping Gwen's round, heart-shaped buttocks and his cock hot-dogging her ass crack. Gwen bites her lower lip, even as Kevin's voice filters through the phone she has tucked between her cheek and her shoulder.

"Gwen? What's going on? Is that Ben?"

Rolling those gorgeous green eyes of hers, Gwen fumbles for an excuse. Telling Kevin that she and her cousin were basically in an incestuous friends-with-benefits relationship ever since they both got old enough to realize the opposite sex was fucking hot would probably go over rather poorly. But she did have to come up with something, given the circumstances.

It didn't help that Ben was being so annoying. Sure, they'd been fooling around for a while, leading to her wearing only her school uniform's blouse at this point, and absolutely nothing else, but he needed to respect her phone time, damn it!

"Uh, yeah. Yeah, I'm at his place. Ya know, helping him study, that's all."

Suddenly, Ben pulls back. Gwen is just about to start ignoring him and talking with Kevin, when she hears the distinctive sound of the Omnitrix a vwooshing into action a moment later. It's loud, annoyingly so, and she growls as she turns to give Ben the stink-eye over her shoulder.

"Would you be quiet? I'm trying to talk to Kev… in."

"Gwen? Gweeeeeen? Why'd you trail off like that?"

But Gwen isn't listening. Instead, she's staring at Ben, who right now isn't exactly Ben. Instead, he's Four Arms. Normally, this wouldn't mean anything. Oh sure, Gwen could go for some beefcake alien if that's what her cousin wanted to add to their play. What she DIDN'T know was that Four Arms could have been called something far lewder as well. Namely, Two Dicks.

Massive red, bumpy dicks, which are even now pointing at her ass. Gwen's green eyes widen as she realizes what's happening a moment before it does, and her mouth opens as she feels Ben poke at her back door and cunt, just like that.

"Don't you fucking dare you little SHIIIIIIT!"

He doesn't give her a chance to finish, and Gwen's eyes very nearly roll back in her head as her phone slips out of the crook of her neck and hits the ground. Four Arms' twins cocks are doing their best to force their way into her holes, DPing her all at once in a way Gwen's never experienced before. But that doesn't mean it doesn't feel good. Their foreplay already had her hot and bothered, and now she had to deal with two meaty, bulbous, bumpy dicks grinding against her insides, slowly stretching her out.

"F-Fuuuuck…"

"Heh, what's the matter, Gwen? Cat got your tongue?"

Ben as Four Arms has a big, shit-eating grin on his face as the red alien continues to push into her. Gwen, meanwhile, bites her lower lip, trying to adjust, trying to get some sense of equilibrium. She's not pulling away though, at least not until her phone begins buzzing again on the floor right in front of her face, where she's half falling off the bed. Kevin is calling back, and Gwen can just imagine what he'll do if she doesn't pick up. If he comes here… yeah, no. That CAN'T happen.

"Shit! D-Damn it Ben!"

Leaning forward, Gwen reaches out and grabs her phone. At the same time, Ben's progress is lost entirely as his cocks pop free of her holes as a result. In response, those big massive red alien hands of his reach out and grab her, and before Gwen knows what's happening, she's been pulled back up onto the bed and flipped over onto her back.

"Oof!"

Those same alien hands grab at her shirt, and even as she cries out in anger, he pulls, causing her blouse to tear open, each of the buttons popping off.

"That was my school uniform you dweeb!"

Rather than rise to the bait however, Ben just leans in, Four Arms' grinning face inches from Gwen's pouty, blushing features.

"Better brace yourself, cousin."

It's only then that she realizes he's pressed the tips of his massive bumpy red dicks back up against her lower holes. With only that warning to give her any sense of what's about to happen, Ben thrusts forward, and every last inch of Four Arms' twin cocks spears up into her. The top one slams into her cervix, compressing her womb, while the bottom fills her bowels. Gwen nearly bites her lower lip hard enough to draw blood as her back arches from the thrust, and her eyes go crossed in pleasure.

"Oh FUCK!"

"Gwen?! What the hell is going on over there?!"

Gwen's eyes snap to the phone in her hand as she realizes in her pleasure, she's inadvertently hit the button to answer the call. Bringing it to her ear, she hears Kevin a bit more clearly, even as she casts her thoughts about, trying to think up an actual answer to give the guy. It's a little hard when Ben's thrusting away inside of her, pounding into her orifices with no thought or regard for her sanity. Not that Gwen minds all that much at this point…

"Ungh, fuck, shit… um, t-there's a big alien! It's massive, I swear! Mm, and it's… it's a-attacking us! S-Shit! Ben is, fuck, they're so BIG!"

That last bit was definitely breaking character, because the they she was talking about was Ben's two fat bumpy cocks. The way they were rubbing against her insides was absolutely fantastic. She wanted more, and luckily, her transformed cousin was all too happy to give it to her.

"They?! There's more than one?!"

Before Gwen can reply, Ben decides he wants to change things up a bit. Two of Four Arms' arms reach down and grab her by her hips and ass, pulling her up off the bed and onto his thick cocks even further as Gwen in turn wraps her long legs around his waist and plants her free arm on his shoulder.

"Up you go!"

"Fuck~"

"Gwen, just hold tight! I'm on my way over!"

That gets through the feverish pleasure haze falling over Gwen's vision, and hearing that, the red head quickly responds.

"Fuck no! I can handle it, don't worry!"

Tired of keeping up the charade at this point, Gwen just tosses the phone over her shoulder. Kevin's parting remark, something like 'What the fuck?!' is drowned out by her moans and her own response, even as Ben continues to bounce her up and down on his dicks.

"I can take it ALL by myself~"

No longer at all reluctant, and no longer distracted either, Gwen moans as she wraps her arms around Four Arms' neck. She pulls herself up his body for a moment, his cocks coming half out of her clenching, squeezing holes, and she leans in close to his ear, whispering sultrily into it.

"So… you gonna fuck me for real now, cous?"

When she pulls back, they kiss heatedly, their tongues intertwining as she presses her ample breasts up against his muscular chest. What follows is exactly what Gwen needs, some delicious DP loving from her cousin's big red alien form. Moans fill the room and Gwen's green eyes roll back in her head again and again as Ben bounces her up and down on his cock.

Eventually, he lays her back down on the bed and climbs over her, pinning her in place. Gwen doesn't mind this either though, giving him a needy look as she bites at his lip.

"Come on, big boy. Don't you dare stop now~"

Ben does as he's told, and Gwen's entire body is rocked by his thrusts as he fucks her into mind-numbing oblivion. He's been holding out on her, there's no other way to call it. Oh sure, they'd had plenty of fun as humans before, but she's never even THOUGHT to use the Omnitrix in such a way. Now… now the possibilities were endless.

"Oh, fuck yes, fuck me harder, FUCKING fill me up Ben!"

As Ben gives it to her harder than she's ever had it before, Gwen's eyes cross and she bites her lip in pure, utter ecstasy. Oh, she could get used to THIS.

-x-X-x-

As Julie comes to a stop outside of Ben's house, she frowns slightly, muttering under her breath.

"You better have a damn good reason for not picking up the phone, Tennyson…"

Taking the spare key from under the mat and unlocking the front door, Julie opens it to immediately be inundated by the sounds of two people vigorously fucking.

"Oh GOD! Almost there Ben, almost there! I'm cumming! I'm CUMMIIIIING!"

"Hngh! Me too cous! Take it all!"

"YESSSSSSS!"

Julie just stands there for a moment… and then snorts derisively.

"Jesus, they're not even trying to hide it…"

Unlike Kevin, Julie was fully aware of Ben and Gwen's relationship. Unlike Gwen, Julie also had an idea of just what Ben could do with the Omnitrix as well. Walking up the stairs to where she can hear voices coming from, Julie can't help but growl a little.

"Damn Gwen, you really know how to squeeze me dry, heh."

"S-Shut up dweeb…"

Pushing open the door, Julie all but barges into the room, finding Ben standing there as himself, with his cock dripping the last drips of a recent release. Gwen, meanwhile, is lying prone on the bed, covered in sweat form what had to be a vigorous workout.

"Fucking really Ben? You couldn't have waited until I got done with Tennis Training?"

"Oh! Hey Jules!"

Oh, so that was how he wanted to play it? Barging over, Julie makes sure to get in her ex's face.

"Don't you 'Hey Jules' me, mister. You KNOW today was my turn. It's not enough that I have to share you with that pink freak, is it? Now this nympho is going to be hogging your cock all day as well?"

Ben just laughs sheepishly. Gwen though, who hears every word of Julie's whisper shouting, snickers from the bed.

"Hadn't you two like, broken up or something? Regardless, you shouldn't worry so much Julie. I'm SURE my cousin has more than enough left for you."

Julie scoffs, but she does pull back to begin stripping out of her clothes. As she gets rid of the things stopping her from getting thoroughly screwed by one of Ben's beastly alien forms, she waves off Gwen's words quite breezily.

"So what if we broke up? It's not ever boy around the block that has a dick like that in his pants. Or a thing like that watch around his wrist. And you better be ready, Ben. If you get tired before me, I'll be taking it out on BOTH of you."

Ben just laughs as he comes up behind her, slapping his fat erection down between her ass cheeks, hot-dogging her for a moment as she puts her clothing down on top of the nearby dresser.

"Don't you worry, Jules. I've got PLENTY more for you whenever you want it. Why don't you go chill with my cousin for me? I'll get ready."

Julie hmphs, and makes sure to sashay her hips as she climbs onto the bed. Gwen and her kiss for a moment, giving evidence to the lie that she was actually upset, or even that she saw Gwen as any kind of competition, rather than just more fun to be had. Soon enough, the two of them are intertwined with one another, Julie laid out on top of Gwen, their legs spread wide.

As Gwen reaches back and spreads Julie's thighs apart to expose her ready and waiting cunt, Julie looks back over her shoulder at Ben and licks her lips with a grin.

"Well, stud? Are you coming or not, Mister Hero?"

Ben just laughs and queues up the Omnitrix.

"Oh, I'm cumming Julie, I'm cumming REAL soon~"

Then, he transforms back into Four Arms and lunges forward. Julie lets out a titter of delight, even as he grabs both her and Gwen, pinning each of them down with ease with his extra limbs. His twin dicks, meanwhile, slide up against the two girls' juicy, wet, dripping cunts, with Gwen's pussy still leaking cum from the last time. That doesn't stop him from thrusting right in though, and as he takes Julie and Gwen both to pound town, the two young women moan wantonly, before eventually silencing each other by smashing their lips together and kissing most passionately.

Ben just settles in for the long haul, thoroughly enjoying the tight cunts wrapped around his cock, but knowing from first hand experience that both his cousin and his ex-girlfriend are entirely insatiable in bed. Neither is going to let him rest anytime soon, but luckily, he's got plenty of alien forms with plenty of stamina to run through.

They're just getting started, and he fully intends to rock their worlds till the break of fucking dawn.

-x-X-x-

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