"YOU'RE FUCKING CRAZY! LET ME GO!"
Feeling panicked at the increased volume in her shouting, Jason shifted around behind her and used the hand pinned to her back as leverage. Despite the trembling of her body straining to stay upright, Jason bore down until she was forced to bend forward and become flush against the dark marble of the kitchen island. With one hand now free he clasped it over her mouth. He was aware at the awkwardness of their placement. Her admittedly perky, taut backside clad in flattering denim was now pressed against his groin.
"Tell me you understand it's not okay to hit someone over stupid shit and I'll let you go." Jason stared down at her, growing angrier by the second at her defiant silence. It was forcing him to be a bad guy and it wasn't what he wanted to be. He didn't want to pin his little sister down and scare her, but she HAD to learn. What if she hit the wrong guy and he hit her back?
Becca continued to remain silent. Jason swore.
"Dammit, 'Becca. You're such a stubborn little brat. I'm serious. You better tell me you understand or I'm going to be forced to do something I'm not going to enjoy. I'm going to remove my hand now. Either you tell me you understand or I have to punish you. That's it. It's your choice."
Slowly his hand slid from her mouth. He held his breath as he waited for her to speak, dread and a delicate sense of hope building in his chest. Deep down in his gut he knew she wouldn't admit to being in the wrong... but he hoped like fuck that she would.
Becca hissed and started to thrash anew. "I didn't do shit, let me go!"
With a heavy sigh of a man resigned to something he didn't want to do, Jason brought his hand up and quickly slapped her over the ass. It was a crisp, ringing sound accompanied with enough force to make her yelp and go still. In the span of several heartbeats, brother and sister were thrust into a world neither could make heads or tails of. For Rebecca, she was stunned and shocked that her brother just slapped her over the ass like she was a little kid. For Jason, he felt a rush of adrenaline the likes of which he had never felt before.
His intentions had been pure... but the moment his hand came down, something in him changed. He enjoyed the way she was shocked into silence. How her entire body jerked the moment his hand slapped over her denim covered backside. How powerful and alive he felt.
Before either one of them could speak, Jason dove head first into that dizzying, powerful rush and lifted his hand again. It struck her over the ass, lifted and struck again. Rebecca squealed and squawked in outrage and pain, her body thrashing in earnest for freedom. Jason's expression darkened. Each stinging smack got harder than the first. If she was going to be stubborn than he was going to spank the stubbornness right out of her.
Rebecca, helpless against her brother, could only be victim to this humilating form of punishment. Each smack against her ass had her yowling, swearing or jerking. She hated it. She hated him. So why was her clit well past hard and throbbing with a heightened state of arousal? Why was her panties getting damp at the gusset, to the point every squirm had the moist bridge of fabric press lewdly to her swollen lips?
Jason didn't let up. He didn't even pause. It became a mechanical up and down motion until his hand was stinging and his arm hurt. As the seconds ticked by, Rebecca's struggles lessened and lessened until physical exhaustion hit her and all she could do to communicate her frustration was squeal. Angry tears welled up in her eyes and trailed down reddened cheeks. After a couple of minutes Jason felt her body go lax entirely. So consumed was he in his rush of dominance he hadn't noticed the gradual ease her body was giving. Or how fucking hard his dick was.
It was as if he had been swept up into his own bubble of control and now that he was coming down from the high, the horror of what was happening was starting to catch up. His hips were slowly grinding against his little sister, placing a delicious friction against his trapped cock. She was panting and sucking in mewling breaths in between muffled sobs. It hit him like a sack of bricks to the gut and was why he sprang back and away from her.
"Jesus! Becca are you okay-" He didn't get to finish. Without the physical support of his body, hers was starting to slide down. He lunged forward and caught her in his arms, dropping to a knee in the process. Rebecca, repulsed and confused and overwhelmed, could do little more than bury her face in her brother's neck while clinging and hiding against him in equal measure. She had felt the hard, insistent bulge against her ass as he spanked her... and god helped her, some part of her hand been turned on.
She didn't say anything in the minutes that followed, even as he stroked her hair and murmured soothing words meant to calm her down. Eventually her huffing breaths stopped. Her face was red from the exertion of her spanking, as well as moist from her tears. Jason wiped at them with the sleeve of his shirt. Weak, tired and dazed, Rebecca nosed at her brother's neck.
"Bed," she mumbled tiredly. Despite how weird and strange and gross she felt just then, napping was the only thing she wanted to. She could rip him a new one for what he did to her afterward.
Jason was disgusted with himself. Despite her tears and exhaustion and how limp she felt, he remained heavily turned on by the situation. Even the way her voice rasped out her plea for a bed made his cock throb in an eagerness that he hadn't felt before.
"Yep," he mumbled awkwardly and hoisted her up in his arms. Awkwardly, he carried her up the stairs to her room and placed her on the bed. His heart hammered wildly in fear and alarm. What the hell was wrong with him and what was she going to do when she woke up?