Having left work early you eagerly open the door and enter your girlfriend Melissa's studio apartment to surprise her.

"Oh, my... You're so much bigger than you." The words hit you like a ton of bricks— almost as heavy as the sight of seeing Melissa's hand stroking Pedro's impressive cock.

Seeing Pedro, your supposed friend, rolling your girl's rosy nipple around in his fingers snaps you out of your trance.

You clear your throat.

"You!" Melissa gasps and covers her exposed breasts with her robe. "I can explain... it's not..." She begins before sighing heavily and saying apologetically "You I have certain needs that you just can't—"

**CRACK*

Melissa is silenced immediately. Her eyes widening as a stunning succubus materializes out of a rift, crimson skin glistening and curves bountiful. The demoness has an hourglass figure that puts Melissa's to shame and obsidian horns curling from her scalp. The succubus summons hellfire shackles to bind Melissa and Pedro and separate them. They struggle but cannot move.

"Help!" Melissa says before she witnesses your body begin to change, your muscles swelling and growing more defined than ever before. Pedro's brows furrow in trepidation as your physique now dwarfs his own, each muscle group more pronounced. Your cock, now a titanic thing that puts his own to shame. The very picture of raw, unleashed virility.

Melissa's jaw drops open. Her turquoise eyes go wide in shock and arousal as your newly gargantuan cock bursts out of the confines of your pants. The succubus smirks at Melissa's astonishment before hopping astride your hips, her bat-like wings unfurling behind her.

Pedro struggles against his fiery shackles, insecurity and shame on his chiseled face when he sees Melissa's look of pure lust as she gazes upon you. "What the fuck? You can't—" His protests overpowered by a strangled groan as the succubus sinks down on your titanic cock. She throws her head back with a wicked laugh.

"Oh, I think he can," the demoness purrs, rolling her hips in a slow grind. "And I have to say, I've never felt a cock quite like yours before. Such a pity Melissa has been wasting all this untapped potential."