Their dad had complained, like he always did, about the tightness of Dennis's outfit. He insisted to his youngest son that women actually liked it better when you left a little to the imagination. When Dennis shrugged and said he wasn't trying to meet anybody, their dad turned to Frank with eyes begging him to back him up.

But Frank just shrugged and told his little brother he thought he looked great.

When their dad sighed and he walked away, murmuring something about Frank being a bad influence, Frank and Dennis shared a coy smile. Their dad had no idea how bad of an influence Frank really was, or how bad of an influence Dennis could be either.

He also, somehow, had no idea that the only attention Dennis was interested in was his brother's.

"You do look really great," Frank had whispered during their chaste, brotherly hug goodbye. He squeezed his little brother's side as he released him then pointed at him with mock-sternness. "So don't let any of those ladies get too handsy, alright?"

"Right, yeah." Dennis laughed self-consciously and rolled his eyes. "I'm sure I'll be beating 'em off with a stick."

"Hm, doesn't sound too comfortable." Frank frowned, but his eyes glinted with humor. He glanced over his shoulder to make sure his dad wasn't looking, then leaned in close and slipped hand over the front of his brother's jeans. "I usually just use my hands."

Dennis inhaled sharply and hummed quietly as his brother squeezed his suddenly growing bulge. But right as he began to rock against Frank's hand, their dad had suddenly reappeared and they had to quickly disentangle from each other.

Now, hours later, Frank swears he can still feel his brother's quickly swelling cock against the palm of his hand, even while he sleeps.

In his dream, Frank slides his palm over his little brother's bulge as he continues grinding on his lap, fusing the remembered sensation and dream sensations in his mind. When his dream brother starts to rock against his hand, he shifts it and angles for his zipper instead as he leans in for a kiss.

Except instead of feeling Dream Dennis's warm, parted lips against his own, Frank suddenly feels a soft, clumsy, and very real mouth kissing along the angle jaw.

He stirs and rubs at his eyes in his now-lit bedroom, frowning. He could've sworn he turned the light off before he went to sleep.

Then a familiar set of teeth drag softly up the side of his neck, and his confusion vanishes.

"Mmm." Frank smiles sleepily at the mop of curls bobbing near his chin. "Den?"

"Mhm," Dennis murmurs against his brother's skin. "Jus' me."

Dennis rolls his hips, rubbing his hard cock along the length of his brother's semi through the layers fabric between them.

Frank hums and drags a sleep-heavy arm up across his little brother's back, stroking lazily. "Dad asleep?"

Dennis nods. "Snoring."

"Good."

Frank wraps his hand across the nape of Dennis's neck, guiding his mouth to his own. Except, when Dennis eagerly shifts and plasters his mouth against his brother's, Frank's senses are suddenly overwhelmed with a sharp, cloying scent.

"Whoa there, Otis," Frank chuckles. He grips Dennis's curls and tries to hold his little brother's lolling head back. "Y'had a few there, bud?"

"Mmhm," Dennis hums sleepily as he continues grinding. "Jus' a few."

"Uh huh." Frank smiles as he tries to angle his little brother's face towards him, but Dennis just pulls away and huffs in annoyance.

"C'mon, Den," Frank chides softly. "Lemme see."

Dennis grumbles, but he lets his brother lift his chin and inspect him.

"Good. Now follow," Frank orders as he moves a finger in front of Dennis's face.

Dennis starts off pretty well, eyes following Frank's finger back and forth attentively. But then Frank gets a sly glint in his eye and starts moving his finger more erratically, checking how easy it is to make him dizzy.

"Nooo, stooop," Dennis complains. He drops his head and buries his face in his brother's neck.

"Okay, alright," Frank chuckles. He pets his brother's back and kisses his curls. "See? We're stopped. No more fingers."

"Mmph," Dennis grunts, but snuggles in closer. He mumbles something that Frank doesn't hear, and then, very slowly, he begins rolling his hips again.

Frank sighs affectionately. "Okay, but," he says with a pointed pat on his little brother's ass, "if you wanna do that then I gotta check you, bud."

Dennis makes a noise that's either a complaint or a reluctant agreement. Frank pretends it was agreement.

"Okay, how 'bout we do the alphabet backwards?" he offers.

Dennis grumbles and grinds his hips a little harder.

"Okay, no alphabet, uh..." Frank slides his hands inside his brother's back pockets, trying to slow his rolling hips. "Maybe, uh, you could walk a line?"

"Nooo," Dennis groans loudly.

"Okay, okay, shh." Frank chuckles and glances at the door. He squeezes his little brother's ass through his jeans. "But you do wanna get off, right?"

"Mhmph." Dennis nuzzles into his brother's neck as he arches his back, pushing his ass against his brother's hands.

"Oh? You do, huh?" Frank teases. Then, against his better judgement, he slips one hand inside Dennis's shirt and trails his palm up his little brother's warm, bare skin. He slides his hands over the muscles he's been helping him build back there, remembering all of their sessions of training — both in the gym as well as their more intensive, less unorthodox training.

Frank swallows as Dennis's slim muscles flex beneath his hands while he works his hips against him. When Frank speaks again his voice is a little rougher. "Just like this?"

Dennis nuzzles his nod against his neck. "Mhmm."

Frank watches with curiosity as his little brother suddenly sits up and reaches down and fumbles at the hem of Frank's shirt, clumsily lifting and tugging until it's bunched around his waist. Then, he rucks his own shirt up with similar dexterity and holds the hem of the fabric between his teeth.

When he lays back down on top of his big brother and presses their bare skin together, Dennis sighs happily as his brother inhales deeply.

They breathe together for a moment, skin against skin. Then Dennis starts rolling his hips again and Frank laughs.

"Not gonna give up, are you?"

"Mh-mh." Dennis's mouth finds his big brother's neck again, kissing and nipping.

Frank usually knows better than to let Dennis near such a potent area on his body before he's fully ready to get off, but his defense was asleep not even 10 minutes ago.

So he's completely unprepared when his little brother's mouth latches around his pulse point and begins to suck.

"Fuck!"

Frank's hips involuntarily lift them both off the bed. He grips tighter around his little brother's ass, and swears he's almost able to feel his skin through the tight, stretchy fabric.

"Jeez, Den," He laughs, slightly delirious with how much blood just rushed out of his head. "Did you actually paint these on?" He tries to make it sound teasing, but it comes out breathless and rough instead.

"Mmm why?" Dennis mumbles against his neck. "Y'gonna check?" He fumbles a hand down between them and starts to tug at his zipper.

"Hey, whoa–" Frank tries to tug his arm away — tries to be a good, responsible big brother. A brother who doesn't take advantage of his drunk little brother. A good influence.

But when Dennis pushes down both of their boxers and his hard cock finally, finally rubs against his little brother's, just like he's been wanting to do all night, Frank practically growls.

"Oh, fuck it."

Frank surges up to meet his baby brother's mouth and rolls his hips up against him.

"Fuck, Den."

"Frank, ah–"

Dennis grinds hard against his lap, rubbing the underside of his cock against his big brother's as the small dribbles from their tips ease the way between them.

"Shit–" Frank curses into his brother's open mouth as he feels his balls draw up. "Oh, I'm not gonna last, bud."

"Mm." Dennis bites his brother's lip. "Wan' ih."

"Yeah?" Frank smiles and rocks his hips up teasingly. "You want that?"

"Mhm."

Frank grins as he tugs his brother down for a deep kiss, tasting the sweet alcohol on his tongue. His mind is screaming at him to stop, to remember he's supposed to be teaching Dennis to be better than him.

But their dad was right — Frank's never been a very good influence. Or a good listener.

Frank pulls off of his little brother's mouth with a groan and presses their foreheads together. Their hips continue rutting fast and hard against each other as Frank stares at Dennis with wide eyes and an open mouth.

"I want it too, bud," Frank pants.

"Mmyeah?" Dennis blinks up at his brother, smiling as his eyes try to focus. "You wan' me?"

Frank smiles, totally endeared by his sweet, sleepy, horny little brother. Then Dennis's tip rubs along his brother's length just right and Frank groans again.

"Fuck, Den." He grits his teeth as his hips speed up. "Oh, I want you so bad."

Dennis moans and buries his face in his big brother's neck, sucking and biting at anything he can get his mouth on.

"Y-yeah, bud," Frank gasps. He holds Dennis's head to his neck, encouraging him. "Just like that. Oh fuck, that's it."

Dennis hums and slides his hands clumsily up the back of Frank's shirt. When he reaches his shoulders, he flexes his fingers and drags his blunt nails down the length of his back.

"Shit– fuck!" Frank's eyes fly wide as heat surges to his groin. "Denny, I'm– you're gonna– FUCK!"

Frank arches as his little brother does it again.

"Please," Dennis begs as he begins to rut and claws at his brother mindlessly. "Please, please, please..."

"Oh fuck, Den," Frank pants. He ruts harder against him, feeling his rhythm slipping more and more with each thrust. "Oh fuck, oh fuck, oh fu–"

Frank suddenly convulses against his little brother, gasping and gripping and groaning as his cock spills and spurts between them.

"Oh my god." Frank gasps for air as his endorphin rush peaks. "Ohh, holy fuck..."

He's aware his brother is still rutting against him as the rush of his orgasm begins to fade but, as soon as it does, his mind tries to spiral.

Telling him what a horrible mess he's made. Telling him to think about what Dad would say.

But then his little brother's hips begin to jerk and stutter, and all of Frank's other thoughts shut off in an instant, leaving only Dennis. 

"Frank," his little brother pleads loudly, "Frank, I'm–"

"Shhh."

Frank claps a hand over his little brother's mouth, glancing over Dennis's shoulder at the door. He gathers his brother snugly against his chest and holds his still rutting body tightly.

"Shh, Denny, I'm here." He kisses his forehead and smiles into his brother's wide, needy eyes over the edge of his hand. "It's okay. I got you, baby. C'mon."

Dennis groans against his brother's hand as his body begins to shake and shudder. His hips' rhythm begins to falter —  stuttering, hitching now instead of rolling. Then suddenly his hips jerk once, twice, then slam forward against his brother. Frank squeezes his hand around Dennis's mouth as tightly as he can as his little brother groans loud and long, cock pulsing and twitching as he paints Frank's chest.

"Mmmm." Dennis melts around his big brother the moment his body relaxes, carelessly smearing their come between them. He cranes his neck up to kiss his brother's cheek and nuzzles his nose against his jaw. "So good."

When Dennis peeks up at his brother with a hazy but knowing smile, Frank laughs and rolls his eyes fondly.

"Yeah, yeah, I know." He kisses his little brother's curls. "You win."

Dennis hums triumphantly as he noses at his brother's jaw.

"Not gonna let me forget it, are you?"

Dennis shakes his head, then yawns. "Uh-uh."

Frank chuckles and tousles his hair. "Well, if you wanna hold it over me that means you gotta remember it first, bud."

"Mm'i will." Dennis nods sleepily against his brother's cheek. "Mhm..."

When Frank shifts around to smile down at his baby brother, he finds Dennis has already fallen asleep.

With a smile and a content sigh, Frank reaches for the nightstand and grabs his trusty come rag to give them both a cursory wipe down. He figures he can clean them up better later, after he gets a few more hours in. Right now, he just wants to enjoy the warmth of his brother's skin against his and the soft, slow sounds of his breathing as he drifts off to sleep. ____ [OPTIONAL EPILOGUE]

Out in the hallway, Robby's hand squeezes tightly around his bulge. Now that all the sounds in his oldest son's room have stopped, the only sound he can hear is his own harsh, ragged breathing and the pounding pulse in his ears.

When the light beneath his son's door shuts off, Robby stands silently in the darkness for a moment. As his once empty mind slowly begins to fill, he can almost see his thoughts barreling towards him. Like the light of an oncoming train.

The moment before they reach him, he quickly turns and heads back down the hallway towards his bedroom. It's only when he closes his door behind him and presses his back against it that he realizes he still has one hand squeezed around himself.

Alone in the darkness, his eyes dart to the time showing in the glowing light of his bedside alarm clock. He does a quick mental calculation, then curses and slides a hand inside his pajama bottoms as he draws the other up to fist in his mouth.

No one knows, he tells his screaming conscience as he begins to fist himself fast and hard. 

No one ever has to know.

"so," trinity says pointedly as she grinds down again. "just touch my fucking tits already before i change my mind."

"right. yeah." dennis nods, quickly looking away from his sister's face and down to her chest. "okay, uh..."

he tentatively moves his hands, peeking up at his sister for feedback. when she shoots him an unimpressed look, he refocuses on her chest and tries again.

"oh for the love of–" trinity grabs over his hands, guiding her brother's fingers over her soft, still pool-glistening skin.

dennis's breath hitches when she guides his thumbs over her nipples, then squeezes them between his thumb and forefinger. when his sister moans softly and starts to move in his lap again, dennis looks up at her with wide, hopeful eyes.

"eyes on your work, dummy," she snaps without looking at him.

dennis obediently drops his gaze back to his sister's nipples, but his mouth begins to water as he watches them darken and stiffen at his touch. he's so caught up with considering whether or not trinity would let him kiss them that he doesn't even notice when his sister unties her bikini bottoms and tugs down the front of his swim trunks to–

"ngh-!" dennis chokes as his sister's soft, wet cunt grinds across his cock.

trinity smirks, then does it again.

"f–! ohmygod." dennis's hands fly to his sister's hips. "okay. uh." he chuckles awkwardly through gritted teeth, then glances nervously at the patio door. "you– you can't just–"