**Birthday Gift to Math Sir**

I couldn’t believe it when Nandini showed up at my apartment on my birthday. She was my student—bright, sharp, and fucking gorgeous. I’d tried to keep things professional, but the way her hips swayed in those tight jeans, the way her full lips curved when she smiled at me in class… Christ, I’d fantasized about her more times than I could count.

And now here she was, standing in my doorway, holding a neatly wrapped box. “Happy birthday, sir,” she purred, stepping inside before I could even invite her in. The door clicked shut behind her, and I caught the scent of her perfume—something sweet and intoxicating, like vanilla and sin.

“I, uh—thanks, Nandini,” I stammered, taking the box from her. Her fingers brushed mine, and my dick twitched in my pants. “You didn’t have to—”

“Open it,” she said, biting her lower lip.

I tore off the wrapping, hands shaking a little. Inside was a fucking tie—black silk, expensive-looking. But before I could even react, Nandini was already stepping closer, her fingers working at my belt. “I thought I’d help you try it on,” she murmured, her voice dripping with mischief.

My breath hitched as her hand slipped past the waistband of my pants, fingers wrapping around my cock. It was already half-hard, and she stroked me slowly, her thumb rubbing over the tip. “Fuck,” I groaned, my hips jerking forward.

Nandini sank to her knees, looking up at me with those big, dark eyes. “You’ve been such a good teacher, sir,” she whispered. “Time for your reward.”

Then her mouth was on me, hot and wet, her lips sliding down my shaft in one smooth motion. I hissed, tangling my fingers in her hair as she took me deep, her tongue swirling around the head before she pulled back to suck just the tip. The sight of her—lips stretched around my cock, cheeks hollowed—was almost too much.

She bobbed her head, taking me deeper with each pass, her hand working the base of my shaft where her mouth couldn’t reach. Her tongue pressed against the thick vein on the underside, and I groaned, my thighs trembling. “Shit, Nandini—you’re so fucking good at this,” I panted.

She moaned around me, the vibrations making my balls tighten. Then she pulled off with a wet pop, grinning up at me, her lips slick with spit and pre-cum. “You taste so good, sir.”

I couldn’t take it anymore. I grabbed her arms, hauling her up and crushing her against me, kissing her hard. She gasped into my mouth, grinding her hips against mine, and I could feel how wet she was through her thin dress.

Without breaking the kiss, I shoved the fabric up, gripping her bare ass. She wasn’t wearing underwear—fuck me—and my fingers slid easily through her slick folds. She moaned as I rubbed her clit, her breath coming in short, sharp gasps.

“Bed,” I growled.

Nandini pulled me toward the bedroom, yanking off her dress as she went. She was fucking perfect—round tits, dark nipples already hard, her pussy glistening and swollen. She pushed me onto the bed and climbed over me, straddling my hips.

“I want you inside me,” she whispered, guiding my cock to her entrance.

Then she sank down, taking me in one smooth motion, her tight cunt stretching around me. I groaned, gripping her hips as she started to ride me, grinding her clit against me with every thrust.

“Fuck—yes, sir—” she moaned, her tits bouncing as she moved.

I thrust up into her, my cock hitting deep, and she cried out, her nails digging into my chest. “You feel so fucking good,” I grunted, slamming into her harder.

Nandini leaned forward, her tits pressing against my chest as she kissed me, her tongue tangling with mine. I could taste myself on her lips, and it drove me wild.

I rolled us over, pinning her beneath me, and fucked her hard, my hips slapping against hers. Every thrust made her whimper, her legs wrapping tight around my waist.

“I’m close—” she gasped, her body tensing.

I reached between us, rubbing her clit in quick circles, and she shattered, her pussy clenching around me as she came with a scream. The feeling of her tight, wet cunt milking my cock pushed me over the edge.

I buried myself deep as I came, pulsing inside her, my hips jerking uncontrollably.

Nandini sighed, dragging her nails lazily down my back as I collapsed onto her, both of us panting.

“Best birthday ever,” I muttered, and she laughed, pressing a soft kiss to my lips.