Clark was slamming himself into Karen as if in a rage when a glint showed in his eyes. Suddenly, instead of kneeling down behind Karen, he was picking her up, holding her back against his belly as easily as he would tote a bag of groceries. Then he plunged her down on his upright erection, jamming her to its base and then back up to the bellend, locking Karen in the violent full-nelson position that made her little more than a masturbatory aid he was jerking off with.
Karen screamed with agonized release. Never before had she been taken with such brutal deliciousness. As she was forced down his prick and then jerked back off it, ecstasy tore through her sex like waves crashing down on a shore. She thought there was no way it could get any better.
Then it was like there was a storm, whipping the waves up to massive heights before they came pounding down. Clark's manhood exploded in a hugely gushing ejaculation, soaking her womanhood so thoroughly that Karen thought she would feel wet for the rest of her life. She silenced her scream with painfully gritted teeth, not willing to repeat her loud mistake from earlier, needing to keep silent, avoid being discovered, stay secret at all costs—
"AHHHHHHH!" Karen finally cried, her hands clenched in her hair until the knuckles were bone-white.
"Karen!" Clark gasped, making it sound simultaneously like a filthy curse and a lovelorn whisper. His pleasure peaked with Karen's sex still clenching around him, and he fell forward to brace himself against the wall, Karen hanging from him, caught by the one arm that still held her in position. "Yes, yes..." he moaned, his lips on her neck. "You cannot be real, Karen... you're like a dream..."
"Oh no—I wake up when dreams get that... intense," Karen replied after a few seconds. "My pussy feels like someone went over it with a meat tenderizer."
"Sorry," Clark said, embarrassed but a little proud. "I guess I got a little carried away. Did I hurt you?"
"Clark, you can hurt me like that every day of the week," Karen sighed. Putting her legs down so she could get unsteadily to her feet, she pulled her top down over her breasts. "In fact, hurt me some more the moment that cock's..."
She turned around to see that, as she should've anticipated, Clark's erection was at full mast, the tip pearly with white precum, ready for more.
"Oh shit," Karen gasped, actually a little fearful. She didn't know if she could survive these marathon sex sessions. Then she reminded herself that she was a Kryptonian just as much as he was. She was literally built for this.
"Shit," Karen said again, smiling shakily. "How do you want to play with that toy, huh?"
"Play?" Clark asked. He opened his belt buckle. "We're not playing, Karen. You've been a naughty girl. And you know what Superman does when people have been bad."
"Give them a good talking-to and buy them an ice cream sundae?" Karen asked sunnily.
In a flash, he reached out, grasped her top, and ripped it open. Her breasts were bare again, but more than that—the shock of the violent action made Karen feel exposed, a little humiliated—she liked it. Breathing hard as the tatters that remained of her shirt fell around her heaving tits.
"Pretty things like this shouldn't be hidden away from the world," Clark said, playing his fingertips over the rotund curves of her breasts. Karen swallowed—they felt more sensitive than ever, goosepimples in the millions covering their massive heft. "You could at least charge admission," he added rakishly.
"And cause a run on the banks?" Karen shot back. "No. I think we should make sure they stay in the right hands."
Clark's fingertips slid along her nipples, the areolas equally oversized, and even more tender than the contours of her breasts. Clark circled them with a smile over how Karen seethed with anticipation. When he took his hands away, the indomitable Power Girl wore a pout as cute as a baby kitten.
"Did you know, Karen, that the belt I wear as Clark Kent is the same one I put on as Superman?" He pulled it out of its loops. With her superhearing, the sound of the leather whispering against the material of Clark's slacks was nearly deafening. "I just reverse it, that's all." He showed her the other side, with the familiar bright yellow. "It's almost unbreakable."
In a rush, he lashed it across Karen's breasts. They wobbled violently under the impact, a red welt across them where it had landed, and Karen moaned piteously in lust and pain.
"Eeuuhhh!" she wailed, her body going as taut as a bowstring. "Again!" she gritted out immediately after her pained outcry. "Harder! Whip me!"