Only after a long, hard night

"I'm sorry, little brother." Jenny breathed in Marcus' ear, her hand rubbing gently at the sobbing boy's belly. "I know I got a little carried away. I didn't mean to, I swear it. It's just...you make me want you so badly. I can't help myself." The young prince just sniffled in reply. All he wanted to do was roll off his bed, and hide under it, away from his sister, but if he tried she'd just grab him and then it'd start all over again.

After she'd taken his purity that first time, Jenny had been insatiable, like a ravenous beast. She'd kept riding him for what felt like hours, pounding herself down on his poor, sensitive dick hard enough his pelvis felt like it was going to break. Two more times he'd spurted, each taking longer and feeling more painful than the last, until she was all full up and dripping his sticky seed back down onto his thighs. He'd thought there was no way he'd get hard again after that, but she'd just slipped off him, pinned him to the bed with one hand and then started sucking on his soft cock, slobbering all over it like it was the most delicious thing she'd ever tasted.

Her tongue had felt so very awful on the tender skin of his head. No matter how much he wriggled and pleaded, she just kept going. When he wouldn't get a boner quickly enough, she'd gotten impatient and then shoved a finger right up his poor butt. It had made him scream and try to fight, but she was strong enough to keep him down with one hand. Worse still, she'd somehow found a spot inside him that felt all hot and tingly and pressing against it had coaxed his tender dick to one last, painful erection. She'd jumped on it in a flash, riding him backward this time, so all he could see was her muscled back and tight, round butt pounding down into his aching pelvis.

After a few painful minutes of that, she'd tossed her hair back and screamed his name, her whole body shaking. Marcus had been worried she was having a fit, but he was too scared of her to do anything. The whole time she'd still been bouncing up and down on him anyway, keeping him pinned firmly to the bed. At last, she'd just rolled off him to one side, lying there twitching and moaning. Still too scared to move, Marcus had just waited while his throbbing dick stood up stiff and aching, dripping with her juices and his own spent seed.

It was soft by now but still really sore, and his butt felt funny where she'd shoved her finger up there with no warning. Plus there were a few stinging scratches on his chest where she'd dug her nails in while riding him. This wasn't anything like he'd thought sex would be. In the naughty books he kept hidden from his Mother under his bed, the lady knights were always so gentle and loving, tenderly kissing and caressing their younger partners while they made love. He'd wanted his first time to be like that, not awful and painful and stolen by his older sister. It all just made him cry harder.

"Hush, darling." Jenny murmured softly. Marcus shuddered when he felt her arms wrap around him, but she just gently pulled him into her chest, so that he was lying right against her boobs. One of her hands rubbed up and down his sweat stained back, while the other held his head there, just tight enough that he wouldn't be able to wriggle free. "It's okay, I promise." She continued. "I just needed to make you mine. That's all. And after so long without you, I couldn't hold back. It'll be better next time. I'll make sure it's good for you too. We can do what you want. Anything at all."

She spoke so sweetly now, the young prince couldn't help but want to believe her. This was still his older sister, right? The girl who'd always protected him and watched out for him when he was a boy. He felt so raw and delicate any comfort was nice, even from her. Maybe this was it, maybe once would be enough for her and tomorrow they could just go back to being normal siblings, like he wanted. Exhausted and heartsick, Marcus lay against her, sobbing softly, until at last he slipped away into a shallow and troubled sleep buried in his older sister's chest.