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Renjun lets Chenle fuck him for the first time on a whim.
They’re the last ones in the pool, everyone else gone home already, joking around until the sun has dipped behind the house and they’re so pruney they can’t stand it. Chenle gets out first, or starts to, pausing on the second step and sitting on the side, feet dangling into the shallow water instead. He leans back on his hands with this animal look in his eye and Renjun can’t help but kiss him.
It’s quick, whatever silent exchange that has them moving in sync, in agreement to what comes next. They break apart to strip out of their suits, Chenle’s shorts flopping to one side on the wet pavement and Renjun’s floating away in the water.
Renjun straddles him, uncaring that his knees press harshly into the pavement. Chenle kisses him again as he lines up and it hurts because there’s no prep but he doesn’t cry out, just sits on his cock. It’s quiet in the backyard except for Chenle’s moan once he’s inside and Renjun starts moving, scraping up his knees.
It hurts: his ass, his knees, the sunburn forming on his shoulder, but he thinks he might like the pain because he feels so good doing this. But he figures the distraction of trying to decide is maybe why Chenle notices before him.
“Your brother is watching us from the window.” He whispers it into Renjun’s neck, face buried there as he fucks into him.
Renjun moans then, louder than he meant to, but doesn’t look. He knows Chenle is right, expected it the same way he expects Chenle to pull away, pull out; but he doesn’t. So Renjun whispers back, right in his ear.
“He likes it, likes watching me.”
“Yeah?”
Renjun nods and bounces harder, getting closer and closer. He wants so badly to look at Kun in the window but he doesn’t.
“You like him watching too.” It’s not phrased like a question, so Renjun doesn’t treat it like one, moaning breathlessly.
Chenle stays silent and Renjun slows to a stop, moving to pull away, nervous, he’s said the wrong thing, but suddenly he’s flipped on his back, cement scraping him up there too, and now he can see his bright red knees, blood pooling in the cuts there, where they’re pushed up so Chenle can fuck him properly, standing in the pool while Renjun lays back and takes it.
“He ever had you?”
Renjun moans again, but shakes his head.
“Why?”
“I don’t know.”
But he knows Kun wants to, knows Kun thinks about him. He’d tested it little by little when he’d started to suspect from Kun’s lingering glances. Sleeping without pants then without underwear then naked with the door open when their parents weren’t home.
Then he’d caught Kun watching him when he brought home a boy for the first time and he’d thought it was blatant jealousy, but it wasn’t, it was just pleasure in being a voyeur.
So he made out with them with the door open, let them finger him open, moaning high and loud without a care, supposedly home alone. But he knew Kun was there and at first he tried to hide how he was watching, peeking around the doorframe, eventually getting bolder as Renjun’s fucking does, wandering past and watching Renjun’s face the whole time.
Once he waited until Kun had gone to the bathroom then guided his guy into Kun’s room, onto his bed and let himself get fucked from behind. When he realized what Renjun was doing Kun made a big show of going down stairs then coming back up, making as much noise as possible, but Renjun didn’t care simply begging his boyfriend not to stop that much louder, but he had, making a break for it out the window.
He lied there, leaking and desperate, waiting for Kun to come finish the job, but he didn’t.
So yeah it was like that all the time, Kun’s eyes always on him. But Chenle was the first to notice. The first to care. But instead of being disgusted, Chenle seemed, unfazed, and he carries on fucking Renjun despite the confession.
“Do you want him to? To fuck you, I mean?”
Renjun nods and starts crying. He did. He really, really did. He knew it wasn’t right, but Renjun wants his stepbrother to fuck him. To own him. His favorite reoccurring dream is Kun waking him up with his cock inside, wet and sloppy.
“Guess I’ll have to share you then.”
“Ohhh!” Renjun moans into a high gasp, tears coming faster and faster, totally overwhelmed at the sensation, of someone knowing his dirty little secret but wanting him anyway. It almost sounds like Chenle wants him to have it, to have Kun.
“We could take turns or use you at the same time, would you like that?”
He thrusts a little harder and Renjun can feel the small bits of concrete digging into his back, only adding to his pleasure somehow.
“Only once he’s fucked you though baby, just the two of you.” He falls forward, looming over Renjun’s spent frame, and whispers: “Tell him I said it has to be special.”
Renjun comes with a shout but Chenle doesn’t stop drilling into Renjun until he comes too not long after, burying himself inside with a groan.
It’s only then that Renjun finally lets himself look over at the window and sees Kun there, watching with a small private smile.