"Professor, I can't find the section on Kantian ethics in this book," I say, my voice tinged with frustration as I wave the textbook in the air. It's our usual spot after class, the small nook in the library where we sneak our secret meetings.

Dr. Matthews looks up from his laptop, his eyes twinkling with amusement. "Let me guess, you've been skimming again?" he teases, pushing his glasses up the bridge of his nose. His tone is playful, but there's a hint of seriousness that sends a shiver down my spine.

I nod, biting my lip. "Maybe just a little," I admit, watching as he stands up and walks over to me. His presence is overwhelming, not just because of his towering height, but the intensity of his gaze.

"Come here, let me show you," he murmurs, his voice low and inviting. He takes the book from my hands and sits down, patting the space next to him. My heart races as I comply, feeling the warmth of his body close to mine.

As he flips through the pages, his fingers brush against mine, sending electric sparks through my veins. "Here it is," he says, pointing at a paragraph. But I can't focus on the words; all I can think about is the way his hand lingers on mine.

"Thank you," I whisper, my breath catching in my throat. He turns to look at me, his eyes darkening with desire.

"You're welcome," he replies, his voice husky. Our faces are inches apart, and without thinking, I lean in, closing the distance between us. Our lips meet in a soft, tentative kiss that quickly deepens. His hand moves to the back of my head, pulling me closer as our tongues intertwine.

The world around us fades away as we explore each other's mouths, the passion building with each passing second. When we finally break apart, we're both breathless.

"We shouldn't be doing this," I murmur, even though my body begs for more.

"I know," he agrees, his voice thick with emotion. "But I can't stop myself when I'm with you."

His honesty surprises me, but it also excites me. I want to know more about this side of him, the side that's hidden from the world. "What else can't you resist?" I ask, my voice teasing.

He smiles, a wicked glint in his eye. "Wouldn't you like to know?"

My curiosity piqued, I nod, eager to explore this new territory. "Yes, I would," I confess, my voice barely above a whisper.

"Then let's find out," he suggests, standing up and offering me his hand. I take it without hesitation, following him as he leads me out of the library and towards his office. The door clicks shut behind us, sealing our fate.

Inside, he turns to face me, his eyes intense. "Tell me what you want," he demands, his voice commanding.

I hesitate for a moment, then gather my courage. "I want to explore," I reply, my voice firm. "I want to see how far we can go."

A smile spreads across his face. "That's exactly what I had in mind," he admits, stepping closer until we're almost touching. "But first, we need to set some rules."

"Rules?" I repeat, my brow furrowing.

"Yes, rules," he confirms. "To ensure we both enjoy ourselves safely and responsibly."

I nod, intrigued by his approach. "What kind of rules?"

He leans in, his breath warm against my ear. "For starters, you have to call me 'Sir' when we're alone," he whispers, his voice sending shivers down my spine.

My pulse quickens at the suggestion. "Sir," I test the word, liking the way it feels on my tongue.

He nods approvingly. "Good girl," he praises, his hand cupping my cheek. "Now, kneel for me."

The command takes me by surprise, but I don't hesitate. I sink to my knees, looking up at him through my lashes. He watches me, his expression unreadable.

"Take off my shoes," he instructs, his voice steady. Obediently, I reach for his feet, unlacing his shoes and sliding them off one by one. As I do, he continues, "And remember, you must always ask permission before touching me."

I swallow hard, my hands trembling slightly. "May I touch you, Sir?" I inquire, my voice wavering.

"Not yet," he replies, his tone firm but not unkind. "First, you need to earn it."

My heart pounds in my chest, a mix of excitement and nervousness coursing through me. "How do I earn it?" I wonder aloud, my eyes fixed on his.

He crouches down, bringing himself level with me. "By obeying my commands without question," he explains, his gaze intense. "Do you understand?"

I nod, my resolve strengthening. "Yes, Sir," I confirm, ready to submit to his will.

He smiles, satisfied. "Very well," he says, standing up and extending his hand to help me to my feet. "Now, let's begin your training."

As he leads me deeper into his office, I realize that our secret affair is about to take a thrilling turn into uncharted territory. And I can't wait to see where it leads us.