He asserts his authority and dominance

"You're going to be very sorry," he growled as Sally's young body trembled in his grip. "And you're going to clean it up."

"Yes sir," she whimpered. "We'll do it right now sir."

He eased his grip on her neck and Sally relaxed, turning to face him, his hand now cupping her throat. Her heart was racing, her pretty face marked with tears and shiny with perspiration. She bit her lower lip anxiously, her eyes searching his face for forgiveness.

He took a short step back from her, still holding her gently by the throat, letting his scornful gaze roam over her. She trembled under his gaze and touch, blushing as she felt her nipples stiffen and her pussy warm.

"Very well. Get to work," he snarled, letting her go and nodding towards the defaced wall. She nodded shamefacedly, going to stand beside her sister, the two of them looking up at their handiwork.

"Do you have a rag or something sir?" Grace asked plaintively.

"Use your shirts," he answered with a sneer, taking obvious pleasure in seeing their faces dissolve in shock and horror, their eyes flickering from each other to him and back again.

"You can't mean that," Grace said with a trembling voice as both sisters stared at him with wide eyes.

"I mean exactly that," he sneered. "Get to work or you can go see the headmistress. I understand there's a new Dean of Students too, perhaps you'd like to discuss this vandalism with them?"

"No...no...we'll clean it up," Sally whimpered, her hands reaching for the bottom of her shirt. Her eyes are shiny with unshed tears as she slowly started to pull it up, hoping he would change his mind.

"Both of you," he ordered. "I'm out of patience."

With a look of resigned determination Grace grabbed the bottom of her shirt and pulled it over her head. Her small breasts looked delicious on her slender body, her stiff brown nipples perfectly decorating her flesh. She looked him with a measure of defiance as Sally stripped off her own top with a muffled sob. More shy than Grace, she covered her breasts with one arm.

"Get to work," he nodded, leaning back against the door, clearly enjoying the sight of the half-naked sisters climbing onto his bed, their shirts in hand.

The spray paint is half dry and there's no chance of simply wiping it away. The most the girls can do is smear some of the paint, ruining their shirts but doing little more than blurring the words.

"It's not working," Sally said in frustration, looking over her shoulder at him."The paint is already dry," Grace added, turning as she speaks, giving him another view of her small sweet tits.

"Well, then you have a problem don't you?" he replies, his voice soft but menacing. "If you can't clean it up, then I'll have to think of an appropriate punishment."

The topless sisters stared at him with glistening eyes. Grace could see that although he was still angry, he was well aware of the nubile young bodies in front of him. His gaze was almost hungry as he looked at them, and she felt her tummy flutter with anxious excitement.

"Get off the bed, and turn around," he rasped hoarsely. Wide eyed, the girls obeyed, Sally looking over her shoulder at him with doe eyed anxiety, her slender arms covering her tiny breasts. "Bend over and put your hands on the bed," he ordered stepping towards the dresser.

"Sir? Please sir, what are you going to do?" Grace asked in a shy quiet voice.

"I'm going to deal with you as vandalising teens should be dealt with," he replied, picking up a hand mirror from the dresser. "Now bend over. I won't tell you again."