An insistent, almost overwhelming pressure began to build in Jack's pussy, somehow simultaneously deep inside her and also centered right on her aching clit. Her moans became cries to the heavens as her pitch rose and her volume wrestled itself free of her control. She couldn't decide if she wanted Charlie to stop or to keep going forever, and each frenzied thrust into her pushed her farther and farther into the intense pressure inside her. What felt like eons was actually only a few seconds before the dam burst and she screamed, her pussy exploding with sensation. "I- I'm CUUUMMING," she wailed, and the thrusting did not relent. The waves of pleasure continued to flow, as Charlie kept his cock deep inside her, now grinding at the white hotness inside her.
Jack's orgasm knocked something loose in Charlie's brain, and while he certainly didn't stop fucking her, he did stop pulling out. He now pressed his groin tightly against her ass as he ground his cock into the spot that seemed to making her wail like that, trying to get her orgasm to ride as long as it could go.
He was dangerously close to cumming himself when he heard a small, quiet "Oh god please cum" from beneath him, and that was it. He lost control, pulling out of her and slamming back in with no sense of pace or rhythm for all of about thirty seconds before it hit him all at once. The sound that escaped his throat may not have been altogether human, and he shoved himself as deeply into his lover as he could muster, his cock pulsing and cum pumping out of his cock for what felt like far too long. Seven, nine ropes of white hot cum? That couldn't be right but he had no idea he'd lost count after four. His cock kept pulsing and twitching long after the cum stopped flowing, and he almost couldn't bare to pull out - except he couldn't hold himself up anymore.
He collapsed backwards, kneeling with his feet under his ass, panting wildly as he tried to catch his breath. Jack collapsed to the side as soon as Charlie's cock was free of her pussy, her legs now aching and her pussy both upsettingly empty but at the same time completely overworked.
Her chest rose and fell with almost no discernible rhythm for several moments before stabilizing, and she managed to croak out "we should do this again some time." Both she and Charlie dissolved into laughter as Charlie flumped forward onto the bed next to Jack, his eyelids already fluttering shut.
"Sure, how's breakfast sound?"
"Right now?" Jack asked quizzically, still barely able to breathe as is. She received no answer, however, except for the beginnings of a snore from Charlie, who was already halfway to REM state. She chuckled and threw an arm over his sleeping form and decided to catch some Zs herself.