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It’s way closer to a real dragon-cock than Laios had expected. Falin’s feathery bush leads down to a puffy red sheath and a supple, ruby-toned set of balls. They’re less wrinkled than the human variant, more firm. He wants to lean down now, poke his tongue in to hunt for the tip of her cock, draw it out and take it as far into his throat as he can- but that’s not what he’s here for. He has to control himself.
Falin idly plays with her pubic plumage, examines herself in the large mirror that Laios brought in from the hall and carefully tucked between her bed and the wall. She asked him early this morning to help her figure out her new configuration. Told him in a hushed town, away from prying ears that she’s felt pent-up but she doesn’t know how to make anything happen. She didn’t used to have a dick and even if she did had it wouldn’t have been this weird draconic thing forced upon her by the dungeon.
“Are you ready to start,” Laios asks, digging his fingers into his thighs to contain his enthusiasm.
Falin nods, forcefully. It’s enough to make her soft thighs, stomach, and breasts jiggle. Laios bites the inside of his cheek. He wants to touch her, but he’s made up his mind not to. Not yet. Later, once she’s used to her new body. Once he’s gotten used to her new body- he doesn’t want to go overboard because of his monster infatuation and get either of them hurt. Especially given how little information he could find on dragon reproductive systems. And even if he could, Falin is a sort of dragon-human chimera, so there must be differences there and-
“Big Brother, can we start now?”
Laios blinks to clear his head. “Yes, right. So to start you’ll just…” He moves his hand down to his crotch, over his pants, mimicking the motion of rubbing at the opening to a sheath he doesn’t have. He tries his best to ignore his cock hardening against his fingers. Falin follows suit- as she does her sheath starts to leak, glistening, slick dragon-precum. She meant it when she said she was pent up.
“Push a little further in, do you feel the head?”
She dips two fingers inside and her hips buck forward into her hand. “Y-Yes! That’s… So sensitive.”
“It’s because of the sheath,” he says, biting his tongue to keep from talking about all the potential benefits of her part-dragon biology. That can wait until she’s finished here.
He watches as her fingers are slowly pushed out by her eager cock. It’s gold with a slight shimmer to it. There’s a knot at the base, he can tell, though that’s still stuffed in the sheath at this moment. Fascinating.
“Do you want the toy now?”
“Yes!” Falin calls, almost cutting Laios off. Her cheeks blush that weird apple-red they get to, but she doesn’t hesitate. “I want it now, big brother,” she reiterates. He doesn’t need to be told again.
He reaches over to his bag and pulls out a plush toy of a dragon. It’s supposed to be the red dragon, the dragon that is now part of Falin. It doesn’t really resemble either of them, but he bought it long before he had the chance to lay eyes on the dragon. It's still cute, still looks like a dragon, and it doesn't feel worth it to throw it out after he painstakingly installed a fancy gnome-made cock sleeve inside.
He holds it out to her, she eyes it hungrily, practically snatches it from him, and testingly presses her dripping, unsheathed cock-head into the toy. It's a big plush, but she has a monstrously big penis, too. He's not sure she'll be able to get the whole thing in there like he can. Or, rather, he knows she can get it in there, he's unsure if her dick won't pop the seams open.
Laios bites his lip. Slides his hand back down to touch himself through his clothes. Watches the candlelight flickers cast tempting shadows on his sister's ample chest and wide hips and big, thick dragon-cock. Tries not to lose himself even as she forces the toy down, down, down to the sheath. Her fingers digging into the plush, indenting the fabric, forcing it to contort its shape for her pleasure. The tip is visible through the dragon's gut, it's stretched enough around it there's a faint hint of golden yellow visible between the threads. The seams are almost ready to burst.
He'd expected to need to tell her more, walk her through it. She doesn't need it, she's gripping the plush with both hands and thrusting up into it. Her mouth is open, her sharp teeth visible. She's panting, drooling, hungry. Her eyes meet his in the mirror, gaze sharp and bordering on feral. His breath hitches. Even without touching her… Just the stimulation through his pants… He grips the sheets with one hand and messily finishes against the other. He holds that eye contact with her throughout.
“More, I need more,” she says, her breath getting heavier. He swallows and scoots closer, leans in towards her neck, waits for permission. “Yes, that. Touch me, I'm getting close but I can't…”
He runs his tongue along her throat and she growls with pleasure. One of his hands finds the overhang of her gut and starts massaging it, the other grips her hair and keeps her close as he kisses, nibbles, suckles at her neck. He watches himself touching her in the mirror. Watches her knot finally unsheathe itself onto to get firmly planted inside the plush dragon. Watches her finish, watches the plush's stomach grow with her load until dragon spunk starts oozing from the barely intact seams. She shakes. He touches her more gently, helps her come down from the orgasm.
She's absolutely spent and there's no way they're going to get that toy off of her knot right now. Laios coaxes her into laying down, holds her with the overstuffed dragon squished between them, warm against his stomach. His clothes are already a mess. The sheets will be a mess by the morning. He'll deal with that then, right now he's holding Falin close and stroking her hair, imagining how good it'll feel when he gets a chance to feel her cock inside him.