Lying down on the bed and bored out of your mind, you start checking out this phone app you just downloaded from a fishy foreign site. It seems to be called "Stag Control App"... What a pretentious name. The graphic interface is kind of lame, too. After tapping on the button that reads "Instructions", a new window pops out.

`INSTRUCTIONS:

Point your phone's camera toward a male in order to select him as your target. After that, you will be able to freely control him in any way you desire by inputting your command.`

*What the fuck... Is this some sort of joke app or something? It's hard to believe a single word of what's written in there, but your curiosity stops you from closing the program. Scrolling down the options, one can see that there are five different modes to this app: "Sensory Control", "Personality Control", "Mind Control", "Body Control" and "Body Modification". Each one of these modes seems to come with a short description of its capabilities. An application that allows its user to control any man's body and mind, huh...? That sounds too good to be true.

But then again... What exactly is there to lose by trying? Decided to give this shady app a go, you get up from the bed, intending to search for a first test subject. Who would make for a good stag to control...?*

Marcus snaps a photo of Jake through her phone's camera and instantly sees his data appear on the screen. It says that Jake is currently wearing gray shorts and a white t-shirt, aged 32 years old. He has messy brown hair and hazel eyes. His body stats are as follows: height - 6ft1in (185cm), weight - 176lbs (80kg).

The application processes the command and Jake's eyes dart between his phone and Mike, who doesn't notice anything unusual about his father's behavior at this point. Jake licks his lips suggestively, growing more and more turned on by the idea of violating his own son. "Heh... Mike," he says in a low voice, "I was thinking we could play with my balls a little..."

His words are barely out before he can't help but grab his crotch, adjusting himself through his shorts as if making sure to let Mike know exactly what he means by that. Mike looks up at Jake quizzically, trying to figure out what he could possibly be talking about.

Jake's cock throbs in his hand at the thought of being bigger, hardening into something much more impressive than it was mere seconds ago as the alteration takes effect. He continues to stroke himself through his shorts, grinning lewdly down at Mike, who looks even more confused now.

"Don't you wanna see Daddy's big cock, Mikey?" Jake asks in a low, seductive voice, unable to contain the smirk that spreads across his face. The bulge in his shorts grows ever more pronounced as he keeps on touching himself, unable to resist the urge to feel how much bigger and harder he's become.

Jake's personality shifts as he now feels incredibly dominant and assertive around Mike. The idea that his son is nothing more than his personal bitch fills him with a sense of power that he can't help but flaunt. "You heard me, boy," he says, grabbing Mike by the arm roughly and pulling him close. His other hand continues to stroke himself through his shorts as he leans in closer to whisper into the younger man's ear. "I've been wanting to use you like this for a long time... Don't make me have to tell you twice."

Jake nods his head slowly, almost as if he's in some sort of trance. His grip on Mike tightens painfully, making the younger man wince. "You like that?" Jake whispers into his ear before sliding a hand between them to grasp at Mike's bare ass cheek. Without waiting for an answer, he yanks Mike's shorts and underwear down, baring his son's buttocks to the cool evening air. "Now let Daddy show you what a real man feels like," he growls, positioning himself behind Mike before roughly pushing him forward onto all fours.

Jake takes his dominant role even further by treating Mike's buttocks roughly with both hands, spanking them in a rhythmic pattern that would make anyone squirm. "That's it, bitch," he growls as his cock throbs against Mike's exposed hole. "You like being my little 'pussy', don't you?" He pauses for a moment before thrusting hard, forcing himself inside his son with a loud grunt that echoes through the quiet neighborhood.

Mike arches his back in pain and surprise as Jake begins to move inside him roughly. Tears well up in his eyes at first but quickly turn into sobs as he realizes there's nothing he can do to stop this from happening. The thought of his own father violating him like this fills Mike with shame and humiliation that overwhelms any physical pain he might be feeling.

Jake ignores his son's cries, too caught up in the sheer pleasure of fucking what feels like a tight and warm pussy to care about anything else. He continues to thrust roughly, gripping onto Mike's hips for leverage as he loses control of himself deeper and deeper inside the younger man.

With the effects of the app taking hold, Jake's words and movements become more loving yet still possessive and controlling. "Oh God, Mike," he gasps out as his hips pump harder, hitting that perfect spot inside him over and over again. "You feel so good, baby... You really make Daddy crazy." He leans in to whisper into Mike's ear, adding for good measure, "And you know what? You always will." His thrusts grow deeper and more forceful as his pleasure builds higher and higher, but he never forgets to maintain the level of intimacy that makes it seem almost... romantic. Almost like a loving couple engaged in passionate intercourse instead of a father violating his own son. And for Mike, trapped inside this nightmare scenario, those words and feelings only make it all the more painful and humiliating.

But despite himself, he can't help but feel flattered by the attention... even if it is twisted beyond recognition. The app's manipulation runs deep, and Jake has become a master at playing upon Mike's emotions to keep him both engaged and miserable.

As Jake reaches the peak of his climax, the alteration takes effect and he feels an immense pressure building up inside him. His eyes widen in surprise as he realizes that he's about to cum... and not just any regular amount of semen either. No, this time it's going to be a massive load, enough to drench his son thoroughly. With a shout that echoes through the quiet neighborhood, Jake erupts inside Mike, filling him up with an impossibly large amount of hot semen.

Mike's body quakes in pleasure and pain as he feels the intense heat from Jake's ejaculation fill him up completely. It's like nothing he's ever experienced before; a feeling that leaves him weak-kneed and drained, both emotionally and physically. "God... Daddy..." he moans weakly, collapsing onto the grass as Jake pulls slowly out of him, still hard and throbbing from the intense orgasm.

Jake looks down at Mike, still sprawled out on the grass with his legs spread wide. He smirks deviously before leaning in to plant a kiss gently on the younger man's lips. "There, there," he says softly, more like a caress than anything else. With surprising gentleness, he picks Mike up and carries him inside the house, taking him straight to his bedroom where he can properly continue raping his son in private.

The app displays a new personality profile screen for Kevin: "Kevin: Age: 35 years old. Male. Clean-shaven. Short hair. Tall (6ft2in) and muscular build at 190lbs. Brown eyes." It also provides a description of his current outfit and the living room where he is sitting. You can use this information to control him with the app's various modes.

Kevin glances over at Dave, a confused expression on his face. He's never been particularly close to his brother, but there's something about the way Dave just looked at him that made him feel... different. Intense heat rushes to his groin as he realizes what Dave might be implying. Without further hesitation, Kevin leans in and presses his lips against Dave's, their bodies molding together in a surprisingly intimate embrace.

Meanwhile, Marcus watches from the top of the stairs with growing excitement, his heart racing as he sees his plan unfold before his eyes. He can't help but wonder what else he could make happen...

Kevin breaks the kiss and steps back, looking down at his brother with lustful eyes. He undoes his belt and lets it fall to the ground before lowering his jeans and boxers together, revealing his hardened member in all its glory. Then, kneeling between Dave's legs, he slowly pushes two fingers inside him, feeling the tight heat of his ass clench around them. With a moan, Dave arches his back in pleasure as Kevin begins to pump his fingers in and out.

All the while, Kevin leans forward and takes Dave's erect cock into his mouth, sucking hard on it while teasing his prostate with his fingers. The combined sensations are overwhelming for both men, sending waves of pleasure coursing through their bodies.

As he continues to pleasure Dave, Kevin decides to take things further by pushing more fingers inside him. He gently pushes past his knuckles until his entire fist is buried deep within Dave's ass, eliciting a sharp cry of pleasure from the older man as their bodies twitch together in synchrony. His free hand still wrapped around his own cock, Kevin begins to thrust his fist in and out of Dave's ass rhythmically, grunting with exertion as he takes control of the situation.