Lydia kissed Stiles, pulling him closer. Their kiss was as dangerous and all-consuming as a wildfire. Stiles felt his insides turn into molten lava as Derek's lips found the back of his neck, the last piece of the puzzle clicking into place. Lydia pulled back from Stiles and took her blouse off, revealing a dark green bra that made her skin glow. Stiles' hands followed the curved of her breasts and teased her nipples through the sheer fabric.
Derek chose that moment to drag his claws down Stiles' sides drawing a moan of him. Lydia unzipped her skirt and let it fall to the floor, then quickly got out of her panties. Soon, her bra followed and she walked back to the bed, lounging with her legs open, touching herself.
Stiles turned his head to the side and kissed Derek, hard and urgent, while his hands undid his pants. With a few more movements, he was out of his pants, pausing to take his t-shirt off as Derek undressed.
By the time they were both naked, Lydia had started moaning softly as she touched herself. Both Stiles and Derek turned in her direction as if pulled by a string. Derek asked, "how do you wanna do this, Lydia?"
She hummed softly, drawing circles around her clit. "I want to take you both."
Stiles groaned, gripping his dick at the base. Distractedly, he heard Derek rummage through the nightstand drawer for a bottle of lube. Stiles took the opportunity to lie on the bed, then turned to the side to kiss Lydia until they were both panting.
He was immersed in kissing Lydia, so much so that he startled when Derek's lubed hand wrapped around his dick, working him at a leisurely pace. Lydia bit Stiles' lip and he moaned, just as she pulled back and pushed him down on the bed. She climbed on top of Stiles until her cunt was rubbing against Stiles' cock. Lydia rubbed herself along his cock, her movements controlled and precise to drive him to the edge. Stiles felt on the edge of begging when Lydia lined up his dick and slowly took him in, her breath coming out uneven.
Once Lydia was seated all the way, Stiles dared to look at Derek stroking his furiously pink cock. Lydia moved her hips on top of him and Stiles lost himself in the warm feelings building at the pit of his stomach.
"Derek," Lydia called, barely turning her head in his direction. Her hair cascaded to the side and Stiles watched enraptured how it contrasted against her pale skin. A moment later, Lydia was back, both of her hands on Stiles' chest, her mouth open in pleasure as she fucked herself on Stiles' cock. "Come on, Derek. Do you need a written invitation?"
Stiles huffed a laugh, then gasped when Derek's thick cock pushed inside Lydia, slowly. It was deliciously tortuous, how Derek entered Lydia sliding along Stiles' cock in the process. Lydia felt so tight, Stiles thought he was going to explode at any moment.
The found a rhythm soon enough, the only sound in the room, the slap of skin against skin and their moaning and panting. Stiles felt electrified, a current lighting up his nerve endings on fire.
Stiles came with a drawn out moan when Lydia tightened as she came herself. Derek groaned as he fucked into her faster, stimulating Stiles to heaven and back. He pulled out when he came, shooting come all over Lydia's ass. Lydia trembled once more and, slowly, climbed off Stiles.
"I'm never gonna get tired of this," Stiles said as Lydia lounged next to him. Derek laughed, then let his body fall on top of Stiles and Lydia. They fell asleep in a mess of limbs and bed sheets, happy and satisfied.