"Mm, I want you to fuck me," she murmured against his mouth, panting hard as his fingers brought her close to climax. "I've wanted you to fuck me for so long." She sat up slightly, moving her hand down between his legs and grasping his large, rigid cock, stroking it slowly and grinning devilishly. Jackson grunted, sitting back and pulling her into his lap, aligning her entrance with his cock before plunging into her wet, virgin pussy. She gave a little cry, the new sensation sending a burst of pleasure through her beautiful figure. He looked up at her, his eyes burning with intensity in the darkness of the room. She knew what to do.
She started to bounce and grind her hips into his and he revelled in her little gasps of pleasure as she felt a man's cock inside her for the first time. His hands explored her body, something he'd wanted to do for so long, and he lowered his lips to her breasts, sucking and nibbling at her nipples, heightening her arousal. She tossed her head back, her long hair sticking to her sweat-slick neck and shoulders, her cheeks flushed as her body moved faster and faster, her need growing by the second. She dug her nails into his broad, muscular shoulders, digging into the flesh until he bled. He hissed, but didn't stop her.
"Ah!" she cried sharply as her pussy throbbed around his cock, her orgasm nearing. He covered her mouth, not wanting their parents to burst in on this unholy scene. He grabbed her hips and ground them even harder into his. He watched as moonlight fell across his sister's beautiful face, her brow knit with pleasure as her mouth fell open in soundless cries of ecstasy as she was plunged into orgasm, feeling her tremble under his hands, her pussy squeezing around his cock as he felt the pressure getting too much to bear. He started to rub her clit, prolonging her orgasm as he started to spray his seed into her, his head falling to her shoulder, biting down on her collarbone as his hot seed coated her soft walls.
The siblings fell in a heap of limbs onto the bed, panting and flushed, but unable to keep their hands off one another. They explored each other throughout the night, each of them cumming again and again. In the morning, Jackson slid out of her bed and returned to his own room and at breakfast, it was as if nothing had happened. It was not until a few months later that the results of their tryst really came to light.
"I'm pregnant," Amber said after closing the door to Jackson's room. Her brother stared at her, dumbfounded. "It's yours," she added, before he could even ask. "You're the only one."
Jackson's eyes fell to his sister's stomach, which was not the flat plane it had once been, but swollen, tantalisingly so. He grinned, pulling her over by the hand and pulling her down into his lap. "Just don't tell anyone it was me," he said, putting his hand on her stomach before sliding his fingers under her skirt.