Makoto opened the snacks with that same fond smile he always wore when enjoying them. "Fine, we can continue."
He took a bite of a potato chip, eyes gleaming. "So, you were the first one to reach for my waistband earlier, Yuna. For your punishment... hmm, you have to strip everything off, including your underwear."
Yuna's jaw dropped. She pointed at Mika, then at herself. "Me? The first one?" Her voice went high and squeaky. "She was right there with me, too!"
Mika took a delicate bite of her potato chip. She looked completely innocent. "I'm not sure what you're talking about, Yuna," she said softly. "My hand was just looking for the remote."
"Liar!" Yuna shrieked. But she knew she'd been caught. A wicked grin slowly spread across her face. The indignation melted away, replaced by something darker.
"Fine," she purred. Her voice turned sweet and dangerous. "You can punish me."
She stood up, right in front of the glowing TV screen. She turned her back to the anime and faced him. But she didn't just take her unicorn pajamas off. No, she made it a slow and deliberate performance.
The zipper buzzed loudly as it went down. She shrugged the onesie off her shoulders and let it pool at her ankles. That left her in just her simple black bra and panties. Nothing fancy, which somehow made it even worse.
She unhooked the bra with a quick flick and tossed it aside. Then her thumbs hooked into her panties. She pushed them down and kicked them away.
She stood there completely naked. The anime's colorful light flickered over her skin. Her body showed everything from tonight. Flushed skin, hard nipples, and the faint shine of sweat mixed with wetness still on her thighs.
"Are you happy now, big bro?" Her voice came out low and growling.
She plopped down on the floor at his feet instead of next to him on the couch. Leaned back against his legs, she made no move to cover herself. "Now, can you pass me a cookie? This punishment is hard work."
Makoto handed her a cookie and a can of Coke, smiling fondly. "You want that seat? Fine." He turned to Mika with a triumphant glint in his eye. "And for you, for following along with her, Mika."
He pulled her into his lap, making Mika yelp sharply. Then his hand started the punishment on her soft ass.
The first slap landed with a SMACK that echoed through the quiet room. It sounded wrong against the cheerful anime music in the background. The thin fabric of his old sweatpants didn't muffle much.
"O-Oh!" she gasped. Her whole body jolted. Her hands flew to his shoulders for balance.
The second slap was just as loud. Another sharp SMACK! A pink handprint started blooming on the gray fabric over her ass.
A small whimper escaped her lips. But she didn't try to get away. Instead, she melted against him. Her body went warm and pliant in his arms. She turned her head and pressed her cheek to his chest. Her breath came hot through his shirt.
"That's... that's not fair," she whispered. Her voice was raw and thick with arousal. "Her punishment was way easier."
From the floor, Yuna craned her neck up. Her eyes blazed with jealous fury. She looked at Mika sprawled across his lap, at the pink mark on her ass, then at her own naked body.
"Hey!" She pointed a cookie at Mika like a weapon. "That's not a punishment, that's just foreplay! I want a do-over! You should spank me too, you fucking pervert!"
Makoto just giggled affectionately. "Nope. I know how much you enjoy being spanked, sis." He looked down at Mika with wicked eyes. "Though, if you want, I can let you help me... spank Mika."
He pulled down Mika's sweatpants, revealing her already reddened ass.
Mika gasped sharply when the cool air hit her bare skin. The sweatpants bunched around her knees like gray shackles. Her skin was already flushed. Two red handprints stood out against her pale skin from his earlier punishment.
"Wait, no..." she whispered. Her voice came out raw and broken. She tried to squirm away, but it was halfhearted. The movement just pressed her more firmly against his lap.
"She'll... she'll hit too hard." The words were a plea, but when she glanced back at Yuna, her eyes were wide with terrified excitement.
Yuna's furious pout slowly curled into a predatory grin. Her eyes lit up with cruel glee. This was a gift. Better than being spanked herself.
"Oh, will I?" she purred dangerously.
She scrambled up from the floor. Her naked body radiated with gleeful intent. She crawled onto the couch and positioned herself next to him, looming over Mika's exposed backside. The poor girl was already trembling.
"Don't worry, Mika-chan," Yuna whispered sweetly, too sweetly. She reached out, not to slap but to trace his handprint with one sharp nail. Mika shivered violently.
"I'll be gentle," Yuna said. Her eyes met his over Mika's prone form. "At first."
Yuna's palm cracked against Mika's other cheek. The sound was sharp and vicious.
SMACK!
"That one's for looking so good in his clothes," Yuna snarled triumphantly.
Makoto giggled again, still with that fond smile. "Be careful not to hurt yourself. Her ass is toned from all that running and exercising."
Yuna made a sound between a scoff and a growl. "Oh, you think so?" Her eyes blazed with competitive fire. "You think she's tougher than me?"
He started groping and massaging Mika's ass. His hands created a strange contrast. While Yuna prepared her next strike, his fingers kneaded Mika's smarting flesh. He rubbed away the sting, spread the heat, turned pain into deep pleasure.
Mika moaned softly, confused. Her body was caught between too many sensations at once.
SMACK!
Yuna's hand came down harder this time. The crack made Mika cry out, her body arched against him. His fingers immediately went to work, soothing the fresh sting, pressing deep into her muscle.
"This one," Yuna panted. She leaned close, her breath hot against Mika's ear. "Is for being a lying, manipulative little bitch."
SMACK!
"And this one is for trying to steal my brother."
Under his expert touch, Mika's hips started grinding against his lap. The pain, the humiliation, and the pleasure were becoming too much. She couldn't think straight anymore. A high, keening whimper escaped as her body started trembling uncontrollably.
"Please..." she whispered. Her voice was raw and broken and could mean anything. "Stop... don't stop..."
Yuna saw it happening. The way Mika's body was coiling tight. The glazed look was taking over her eyes. She recognized her approaching orgasm. With a final triumphant roar, she brought both hands down at once in a thunderous double slap.
SMACK! SMACK!
"And this one," Yuna said, voice low and triumphant, "is because I'm enjoying myself."
That did it. Mika screamed. The sound was raw and uninhibited as pure release crashed through her. Her body convulsed in his arms. The orgasm hit her in violent, shuddering waves that left her boneless and sobbing against his chest.
Yuna stood back, panting. Her naked body gleamed with sweat. She looked at Mika's bright red, trembling ass, at the girl who was now a quivering mess in his arms. A slow, possessive smile spread across her face.
"There," she said with satisfaction. "All better."
Makoto gently rubbed her ass, still wearing that indulgent smile. "Wow, I didn't know you could climax just from being spanked, Mika. How naughty."
He grabbed some ice from the bucket and pressed it to her reddened skin. Mika shivered when the cold ice touched her heated flesh. A soft, broken whimper came out.
She didn't pull away, though. She pressed closer instead, burying her face in his neck. Her body was boneless and trembling in his lap.
"I... I didn't know either," she whispered into his shirt. The confession was small and shaky.
She sounded ashamed but also giddy with discovery. Like she'd learned something new about herself, and she wasn't sure what to do with it.