My sister sent me to spy on her fiance

My sister Nancy had been a wreck all week. The wedding was tomorrow, and she was convinced Mike was going to go out on his bachelor night and fuck the first thing that moved. She'd told me about his libido—how he needed it every day, sometimes twice, and how the week-long dry spell leading up to the wedding was making her insane.

"So go check on him," she'd begged me, her hands trembling as she adjusted her veil for the fifth time. "Make sure he's not sneaking out. Just... watch him. You're family now, practically. Tell him I sent you to help with last-minute stuff."

I'd agreed because she's my sister, and because I wanted to help. But also—and I hate admitting this—because I was curious. Mike was handsome. Tall, broad-shouldered, with a jawline that could cut glass. I'd seen the way he looked at me at family dinners, his eyes lingering a second too long on my legs, my lips. I'd always dismissed it as nothing.

So here I was, standing outside his hotel room door at 11 PM, wearing a loose sundress and no underwear. I don't know why I'd done that. Maybe I wanted to feel sexy. Maybe I wanted to be ready for anything.

I knocked.

He opened the door, shirtless, wearing only sweatpants that hung low on his hips. His chest was sculpted, dark hair dusting his pecs, trailing down his stomach. He smelled like soap and whiskey.

"Hey," he said, his voice rough. "Your sister sent you?"

"Yeah," I said, trying to sound casual. "She wanted me to make sure you weren't, you know, getting into trouble."

He laughed, a low, rumbling sound. "Come in. We should talk."

I stepped inside, and he closed the door behind me. The room was dim, only a bedside lamp on. A bottle of Jameson sat on the nightstand, half empty. He gestured to the bed.

"Sit."

I sat on the edge of the mattress, my dress riding up my thighs. He didn't sit next to me. Instead, he stood over me, looking down.

"You know," he said, "I've been doing some thinking. About you."

"Me?"

"Yeah." He crouched in front of me, his face level with mine. "The way you look at me. The way you dress. That little sundress, no panties, am I right?"

My heart stopped. "How did you—"

"I saw you in the parking lot. When you got out of your car. The wind caught your dress." He grinned, slow and predatory. "You wanted me to see, didn't you? Little spy, sent to keep me in line. But you're the one who's been naughty."

I opened my mouth to deny it, but he was already pushing me back onto the bed. My dress bunched around my waist, exposing my bare pussy. He let out a low whistle.

"No panties. Just like I thought."

"Mike, we shouldn't—"

"Shut up." He knelt between my legs, his hands gripping my thighs, spreading them wide. "You came here to watch me. Now I'm going to give you something to watch."

He lowered his head, and his mouth found my cunt.

His tongue was hot, flat, licking a long stripe from my asshole to my clit. I gasped, my hands flying to his hair, trying to push him away but pulling him closer instead. He lapped at me like I was dessert, his tongue circling my clit before flicking it hard.

"Fuck," I moaned, my hips bucking.

"Taste so good," he murmured against my skin. "Been thinking about this since the first time I saw you."

He pushed two fingers into me, curling them, finding that spot that made my vision blur. I was soaked, my juices coating his hand. He sucked my clit into his mouth, and I came with a sharp cry, my back arching off the bed.

He didn't stop. He kept licking, sucking, fingering me through my orgasm, and when I was trembling and oversensitive, he pulled his fingers out and stood up.

"Now," he said, shoving his sweatpants down. His cock sprang free, thick and hard, veined, the head glistening with pre-cum. "Now I'm going to fuck you."

"Mike, Nancy—"

"Fuck Nancy." He climbed onto the bed, positioning himself between my legs. "She sent you to spy. Well, now you've got a report to file."

He pushed into me, and I choked on a scream. He was big, stretching me in a way that burned, but I was so wet from his mouth that he slid in deep, bottoming out with a grunt.

"Fuck, I knew it," he groaned. "Good pussies seem to run in your family."

I wrapped my legs around him, pulling him deeper. "Don't talk about my sister while you're fucking me."

He laughed, a dark, breathless sound, and started to move. His pace was punishing, each thrust hitting my cervix, making me see stars. I bit my lip to keep from moaning his name, but it spilled out anyway.

"Mike—Mike, yes—"

"That's it. Say my name. Let me hear how much you love your sister's man's cock."

I was shameless, spread open beneath him, letting him use me. I came again, my pussy clenching around him, and he growled, burying his face in my neck as he fucked me through it.

"I'm gonna cum," he hissed. "I'm gonna fill you up."

"Do it," I begged. "Cum inside me."

He slammed into me one last time, his body going rigid, and I felt his hot seed flooding my womb. I came again, clenching around him, milking every drop.

We lay there panting, his cock still inside me. I could feel his cum leaking out of me, soaking the sheets. He pulled out slowly, and I whimpered at the loss.

He got hard again almost immediately. I saw it—his cock, slick with our combined mess, rising between us.

"Round two," he said, flipping me onto my stomach. "On your hands and knees."

I obeyed, arching my back, presenting my dripping pussy to him. He lined up and pushed in without preamble, filling me again. This time he fucked me slower, deeper, each thrust a deliberate, possessive claim.

"Look at you," he rasped, his hands gripping my hips. "You're supposed to be keeping me from cheating. But here you are, letting me fuck you like a whore."

"I'm your whore," I moaned, pushing back against him. "Your little spy whore."

He laughed, spanking me hard. The sting made me clench around him, and he groaned.

"Good girl."

We fucked until we were both slick with sweat, until I'd lost count of my orgasms. When he came again, it was with a loud groan, his cum spilling into me, and I came with him, my body shaking, my mind blank.

He collapsed beside me, both of us panting. I felt his cum trickling down my thighs, soaking the ruined sheets.

After a long moment, he propped himself up on one elbow and looked at me.

"Now," he said, his voice casual, almost kind. "Go tell your sister what you found out. Little spy."

I stared at him, my heart pounding. He was smiling, but his eyes were serious.

I got dressed, my dress damp with his cum, my thighs sticky. I didn't look back as I left the room.

In the hallway, I leaned against the wall, trying to catch my breath. My pussy was aching, still dripping. I touched my stomach, where his seed was cooling against my skin.

What was I going to tell Nancy?

The truth? A lie?

And more importantly—would I come back tomorrow night?