Landing just outside the doors of the Hall of Justice Karen smirked as she stepped inside and made her way down to the meeting room, as she walked everyone stopped and stared at the woman, whispering quietly about her figure. In the course of two weeks Power Girl had gone from a statuesque six feet to a now towering seven foot three, her hips were as wide as a car tire with a rear that shimmied with every deliberate step, her costume so tight it was pulled into a thing. Thick arms and long stout legs framed the plus sized woman as she stormed through the halls, her P cup breasts wobbling even under the confines of her white one-piece suit, the thing looking like it would burst open at the cleavage window if she so much as held her breath.
But they weren't the only ones staring, Everywhere Karen looked she eyed up her former allies like a wolf sizing up potential prey, her nostrils flaring just as she entered the conference room and locked the door behind her. Changing her demeanor she looked over to the table to find J'onn J'onzz sitting alone at the far end, a file nearby as he went over it page by page. "You needed me J'onn?
Looking up the green skinned Martian gave her an expressionless look before gesturing for her to sit. "Our communications from last night claimed Starfire had run into three indescribable creatures, the damage to the street was extensive, enough so that even SHE couldn't handle it." Pressing a button at the table a holographic display of an audio file played, replaying the message Koriand'r sent to Power girl that very night. "We've lost contact with her, she hasn't answered her communicator, I was hoping you could give answers as to last night."
"J'onn... Haven't you been curious of my growing...Femininity?" Sitting up from her chair with an audible creak, she leaned forward to push out her chest, tracing a blue gloved finger down her abyssal cleavage to show it off. Non-plus the Martian Man Hunter looked her in the eyes, finding a strange predatory gleam in Karen's stare. "Let me tell you what happened yesterday night, No! Let me tell you about two weeks ago. During the shuttle explosion a bit of that goop splattered against my skin and I passed out." Wide eyed with shock, showing emotion at last J'onn sat stunned as she continued. "When I woke up I was starving and hornier than a bunny rabbit..." Getting up from her chair she moved faster than the Martian could react and pinned him to his chair. "Then THIS happened!"
Letting her appearance slip she reverted to her alien form, her skin turning green and scaly while her hair grew into snapping tentacles, the hands she gripped around J'onn's wrists grew sharp claws just as her eyes turned yellow and slit, with horns sprouting from her brow. "Karen Starr... You've been infected!" Power Girl snarled, bearing rows of razor sharp teeth as three of her tendrils punctured the chair she pinned him in. "Your people have stopped my kind at the bitter end, but now they have a new host, ME!"
"Karen you must listen to me, this isn't you, you have to fight it as best you can before any more damage is done." Desperately pleading with the formerly blonde heroine J'onn continued. "Our war with that species was grim but it could be contained, but YOU, you can't be contained, you can exist in the vacuum of space and travel at the speed of light! You have to be stopped or else the entire galaxy is in danger!"
Blinking rapidly and looking pensive Karen's grip loosened as it seemed she was backing away, just before she smiled darkly at the Martian and her eyes went from a reptilian yellow to a glowing red. "I like that plan J'onn, nice of you to think of it for me." Unprepared for what came next J'onn gasped as Power Girl's heat vision struck him dead in the forehead, burning a pair of holes into his skull as his sudden pleas for help turned to mindless drooling. Letting go of the man Karen stood up and smirked at the lobotomized Martian, his body going limp but still alive.
"I must say J'onn I never considered how... Healthy you were til now." Leaning down she extended her long tongue to lick the entire side of his alien face before looking down at his waist, pulling off his trunks she licked her lips at his male organ before looking back at his pale eyes. "Don't worry I have a trick to get you hard." Guiding some of the tentacles from her scalp she slithered them around his waist and brought them to penetrate his anus, massaging his prostate as his erection started to form. Prying the bottoms of her costume to the side she positioned herself over his waist reverse cowgirl and pulled him in. The room was sound proof, its doors heavy and solid, keeping anyone outside the halls from hearing what was going on inside. If they could hear it they would have shivered at the shrill screams coming from Power girl as she used J'onn's prone body to get off, combing her claws through her tentacle filled hair Karen wailed and moaned as she rocked back and forth over his bruised body, just as she finally triggered his release and drained him for every drop he could give her.
Dipping her finger down to taste his cum Power Girl smiled as she pulled away, repositioning her costume as she looked the broken man over. "You taste lovely J'onn... It's a shame you're the only one left." Leaning over to kiss him on his scorched forehead Karen opened her mouth wide, her many rows of teeth becoming visible as she stretched her maw wider, unhinging her jaws like a snake as the last image in J'onn's shattered mind was looking into the abyss of some monster predator. By the time she was done not even blood stained the carpet floor.
***
Stepping out of the meeting room Power Girl made her way out of the Hall of Justice, licking her lips as she heard one of the younger heroes nearby whisper, wondering if she had put on weight since last they saw her. By the time she came out of the double doors she flew out of sight, flying at the speed of a fighter jet straight home to her lair, her nest. Arriving inside she looked over to find her children awake. Her daughter tending to the younglings while Atlee got more acquainted with her sons, sucking them both off at once as she made them grunt and growl in her ministrations.
Looking down at herself Power Girl looked wistful as she grabbed both ends of her cleavage window and ripped it wide open, tearing her costume off her massive curvaceous form. Pulling off her gloves, boots and cape she bundled the mass of ruined cloths and bit into it, chewing into the Kryptonian leather and cloth until nothing was left.
She had done it, it took her kind thousands of years to finish it, but she had finally killed the last Martian in existence. Now she was free to grow and spread, to repeat the same experience her species had back on Mars. She just couldn't wait.