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"Khaji, please," the Impulse whines from underneath them.
Khaji Da twists Jaime's lips into a smirk as they dig their fingers into Bart's waist.
"Specify, Bart Allen,"
Bart writhes under them. Khaji Da watches their cock sink deeper into the Impulse as he presses back against them. Heat wells up in Khaji Da's gut.
"Move!" The Impulse demands.
Khaji Da uses Jaime's voice to laugh softly, leaning down to mouth at Bart's neck. Bart goes very still and hisses when Khaji grazes their teeth over his spine.
"You are so impatient, Bart Allen," Khaji tells the Impulse, putting as much affection into Jaime's voice as they know how. "And so demanding."
But Khaji Da is also impatient, so they squeeze the Impulse's hips harder and snap their hips forward. Bart's cunt is wet and hot and Khaji Da wants them to be deeper too.
Bart shouts when Khaji Da hits his cervix, and the sound encourages the scarab to speed their movements, sinking their teeth into Bart's shoulder as they fuck the little speedster open. the Impulse's cries get higher and more erratic and Khaji Da hums, an organic warmth filling their chest.
"Fuck, Khaji!" Bart sobs. "Your cock- its so-"
He cuts off with another cry when Khaji Da reaches up his body to twist and tug at his nipples. Khaji Da swells with a weird sort of satisfaction that they know how to fuck him to speechlessness.
"Technically, it's an ovipositor," Jaime chimes in from where he's curled up in the back of Khaji's consciousness. Khaji Da rolls their eyes.
They, of all beings, know the specifics of their own anatomy, including that they were engineered to populate Reach conquered worlds, with Infiltrators laying their eggs in viable hosts on their colonized worlds.
Khaji Da's fertility and desire to breed the population of Earth was, of course, corrupted with the rest of their Infiltrator programming.
That being said:
"Oh fuck!" Bart cries as Khaji Da fucks him harder. He's caged under them by the long scarab limbs that spring off their back, and their legs pinning his own. Bart reaches up to cling to the scarab-limbs, biting the sheets. He writhes.
"He's taking you so well," Jaime says to Khaji Da, his voice soft. aroused.
"Jaime Reyes wants me to praise you, Bart Allen," Khaji Da tells him. "You are taking me so well."
The Impulse whimpers and turns to kiss Khaji Da, tugging them down by Jaime's shirt. "You feel so good," he gasps against their lips, "You're so good."
Khaji Da kisses their speedster deep and presses flush against his back, rutting their cock into his pussy.
"I'm going to-" Khaji Da warns.
"Please, pleaseplease, inside me please," Bart begs, arching up to get them as deep as they can.
Khaji Da bites down on Bart's shoulder again, harder, as they spill their unfertilized eggs into their mate. Bart wails as the eggs push past his cervix and into his womb.
They've done this a few times before, but Khaji Da is always amazed by how willing the Impulse is to take even unfertilized reachling eggs into his body. By the way his legs are shaking and he's whining against the sheets, he almost certainly enjoys the feeling.
Khaji Da sighs, satisfied, as they pull out of Bart, their mechanical limbs and ovipositor retracting back into the scarab as they pull the speedster against their body, spooning him as his shuddering subsides. Bart moans happily and rocks back against Khaji Da, turning to press kisses against their jaw. Khaji Da is very aware of Jaime’s anatomy again, his host’s cunt- wet between their thighs.
“I love you,” the little speedster mutters between kisses, “both of you.”
Khaji Da’s chest flutters at that, and they pull Bart into a more solid kiss. He hums against their lips and turns around to wrap his arms around Khaji’s neck and deepen the kiss. Khaji Da groans as Bart bites their lip and presses his tongue into their mouth.
Jaime’s interruption comes when Khaji Da has their hands wrapped tightly around Bart’s wrists and is moving to pin him under them again. “Hey, Khaji, quit hogging our boyfriend.”
Khaji Da snorts. “I do not hear any complaints from Our Boyfriend, Jaime Reyes,” They say out loud.“But if you insist.”
Bart whines when Khaji Da stops moving their thigh between his legs. And then it’s Jaime smiling down at Bart.
“Hi,” says Bart, breathless.
“Hey,” says Jaime, leaning down to kiss Bart's neck.
Bart whines, spreading his legs more. “Fuck,” He groans as one- two of Khaji’s eggs push out of his cunt, “I’m so full.”
Jaime hums, sliding two of his fingers easily into Bart’s pussy, pushing against the egg that is trying to escape his womb.
“You can take it baby,” Jaime coos, “So good for us.”
Bart rocks against Jaimes fingers, biting his lip as he looks up at his boyfriend, “So, I take it this means you want a round two?”
Jaime grins and kisses Bart again, pushing him against the sheets,
“Jaime Reyes has the energy for at least three more “rounds”, as do I,” chirps Khaji Da
Bart laughs at that, between kisses, “And you two call me insatiable!”