"Come here," Alex commanded. He pointed a finger at the floor right between his legs.

Marine shook her head fast. Her blonde hair flew around.

"No! I don't want to! You look scary!"

Alex narrowed his eyes. He put on his "Manly Serious Face." He stopped smiling. He looked at her with pure dominance and authority. He looked like the man of the house.

Marine saw that face. She saw the seriousness in his eyes. She gulped loudly. Gulp. Her throat moved. She knew she couldn't disobey that face. It was too powerful.

Her legs moved on their own. She slowly, very gently, walked towards him. Step. Step. Step. She kept her hands tightly over her bosom, hiding the white bouncing mounds. She stopped right in front of his knees.

"Y-yes?" she whispered.

Alex looked up at her innocent face.

"Your punishment is the same as last time," he declared.

Marine's eyes went wide with horror. She remembered last time! She remembered the sting!

"No! Big Bro, no! Not that!" she cried out. "I am too big for that now! It's embarrassing!"

But Alex didn't care about her protests. He didn't care about her excuses. He moved fast. He reached out his hand and caught her wrist. Grab.

"Too late!"

He yanked her arm hard.

"Kyaaa!"

Marine lost her balance. She fell forward. Alex caught her waist and pulled her down. In one smooth motion, he dragged her right onto his lap!

"No! No! Let me go! Please, Big Bro! I promise I won't do it again!"

Marine struggled hard. She kicked her bare legs in the air. She wriggled her body like a fish caught in a net. She tried to push herself up, but Alex's arm was like an iron bar clamped around her waist. She was trapped! She was totally helpless across his lap!

"I am a good girl! I am innocent! Please don't punish me!" she pleaded. Her voice was desperate. She sounded like she was about to cry.

"You are not a good girl. You are a naughty brat who steals shirts," Alex said calmly.

He didn't spank her immediately. Instead, he placed his large, warm hand flat on her bare back. He started to rub it.

Slide.

He ran his hand all the way down her spine. He felt every single vertebrae. His palm was rough and hot against her smooth, creamy, milky skin. He stroked her back slowly, feeling the warmth of her body.

"Ahhh..."

Marine's struggle suddenly paused. A sound escaped her throat. But it wasn't a squeak. It wasn't a cry of fear like last time. No. It was a low, shaky moan.

"Mmm..."

She bit her lip. Why did his hand feel so good? Why did it send electric shocks down her nerves? Last time, it was just scary. But this time, with her chest pressed against his knee and her back exposed, it felt... forbidden.

Alex smirked. He heard that change in tone. He looked down at the main attraction.

Her ass was right there. It was sticking up in the air. The blue lace panties were struggling to contain the mass. Her ass cheeks were fatty. They were perky. They were round and soft like marshmallows.

He lifted his hand high in the air.

SMACK!

He brought it down right on her right cheek!

"Kyaaa! Ouch!"

Marine yelped. Her whole body jumped. Her ass cheeks jiggled violently from the impact. Wobble wobble. The flesh turned a little pink.

"That is for stealing," Alex said.

Then, instead of lifting his hand up again, he dipped it. He let his hand slide down the curve of her butt. He grabbed the fatty cheek with his whole hand and squeezed it. Squeeze. It was so soft!

Then, his fingers acted on their own. They "accidentally" slipped. They dipped further down. They slid right into the deep valley between her cheeks. His middle finger brushed against the fabric of the lace right near her most secret entrance.

"H-hyah!"

Marine gasped. Her whole body stiffened.

"Oops," Alex whispered, not looking sorry at all. "My hand slipped."

He dragged his fingers back up, tracing the crack slowly, before lifting his hand for another spank.

SMACK!

"Ahhh... n-no..."

Her protest was getting weaker. She stopped kicking her legs. She stopped trying to push him away. She just lay there, limp on his lap. It was like she was waiting. It was like she was anticipating the next hit... and the next "accidental" touch.

She felt a new, weird feeling growing in her stomach. It was hot. It was heavy. It was a feeling she had never felt before.

'Why...' she thought dizzily. 'Why do I want him to do it again? Why is my body getting hot?'

Marine's mind was suddenly flooded with memories. She remembered that book. That specific, thick book her boyfriend had given her just a few days ago.

It was a dirty book! It was the first time she was exposed to something called sex.

Before that book, she did know what it was, kind of. But nobody had told her what it really was. She just thought it was a boring baby-making procedure where people held hands or something.

But the book... the book described everything! It described the heat, the sweat, and the pleasure.

And from the moment she read it, she was feeling a new, strange sensation between her legs. It was a throbbing feeling. She didn't know what it was and all back then.

But now? Lying here on her step bro's lap?

When she remembered Alex spanking her that day in the past, she realized something crazy. She felt that she had felt the same thing that day too!

But since she didn't know what it was that day, she had dismissed it as just pain. But today... today was totally different. She had the knowledge now!

"You are being very quiet, Marine," Alex said, his voice deep and rumbling against her chest. "Are you reflecting on your sins? Are you thinking about how bad you were for stealing my shirt?"

"Ahhh~!"

Marine let out a sound. It wasn't a squeak. It was a full-blown moan. She couldn't help it!

SMACK!

Alex brought his hand down again. But this time, when his hand landed on her soft, fatty cheek, he didn't lift it up immediately. He let it slide down.

His large, rough fingers slid down the curve of her bottom. And then, oops, they "accidentally" slipped right into the middle.

They slipped right into the deep crevice below. Two of his fingers pressed right against the fabric of her blue lace panties, directly over her most intimate area.

"H-hyah... B-Big Bro..."

Marine trembled. She felt it! She felt his fingers pressing on her special spot!

And because of the book, she knew exactly what was happening to her body. She felt the wetness. She was getting moistened! Her panties were getting damp with a sticky fluid that the book talked about!

"What is wrong?" Alex asked, acting totally innocent. He kept his fingers there, rubbing the spot gently through the lace. "Why are you making those weird sounds? Does it hurt?"

He knew. He definitely knew! But Marine couldn't admit it!

"I... I don't know!" she lied. She buried her face in the bedsheets to hide her burning red face. She decided to act. She had to act like she didn't know anything! She had to be bashful!

"It just... it feels weird! It feels funny! Stop touching there... it makes my tummy feel funny!"

"Funny?" Alex chuckled darkly. "Well, stealing is funny too. So I guess this is the perfect punishment."

He moved his fingers again, pressing a little harder, making her hips jerk involuntarily on his lap.

Suddenly, Alex stopped.

He stopped his hand in mid-air. He didn't bring it down for another smack. He didn't dip his fingers into her valley again. He just stopped.

"That is enough," Alex said. His voice was calm. "That is enough punishment for today. I think you have learned your lesson, Marine."

He grabbed her waist and lifted her up. Woosh. He put her back on her feet on the floor.

Marine stood there, wobbling a little bit on her legs. She felt a sudden, massive wave of disappointment crash over her.

'No! No, don't stop!' she screamed inside her head. 'Why did you stop? It was just getting good! I wanted more! I wanted you to touch that spot again!'

She didn't want him to stop at all. Her body was crying out for more of his rough hands.

But obviously, she can't say that aloud! She can't just tell her big Step Bro, "Please spank my ass more and touch my pussy!" That would be insane! That would be too embarrassing!

So she just stood there, looking at the floor, biting her lip.

Alex looked at her. He observed her closely. He saw her flushed face. He saw her trembling legs. He saw the way she was breathing hard.

'Wait a minute,' Alex thought, narrowing his eyes.

'This isn't the reaction of a girl who hates punishment. This is the reaction of a woman who knows what pleasure is. Something changed. She used to be totally clueless. What caused her to be suddenly aware of sex and all? Who taught her?'

He was suspicious. He was very suspicious. He decided right then and there.

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