Teased my little sis’s (19F) boyfriend under the dinner table... and then some more later [MF]

It's Saturday night, and I'm just chilling at home, not planning to go out or anything. My little sister (19f) and Matt, her boyfriend, are here, messing around in the kitchen and making dinner. They ask if I want to join, and I'm like, yeah, sure. But honestly, I'm not hungry and just dying to mess with Matt again, see how far I can push him after that insane orgasm he gave me in the pool the other day. I still can't shake that memory.

We're all sitting at the table, eating. My sister right next to me, and Matt's across from us. I take the opportunity, slip off my slippers, and slide my foot under the table toward Matt. My toes brush up his leg, slowly, right to his crotch. He flinches, shoots my sister a confused look, like he's into it but kinda worried. I'm biting my cheek to keep from laughing, because he totally thinks it's my sister rubbing his cock with her foot, not me. With her this close, it's such a risky move, and that's got my heart racing.

She's distracted, going on about something on her phone, so I keep it up. Matt's face is all red, but he's not pulling away or saying a word. I rub harder, working his cock through his jeans with my toes, really pushing it. He lets out a shaky breath, glances at my sister like, is she for real?

He's struggling, but I can tell he's loving it. His eyes keep bouncing between me and her, so confused, until my sister stands to grab more wine. That's when Matt peeks under the tablecloth, sees my leg stretched out.

His eyes go wide. "Fuck, that was you?" he whispers, totally thrown.

I smirk, bite my lip, give his crotch one last nudge with my foot, careful so my sister won't catch me when she sits back.

He groans, looking so flustered and turned on, I swear he's going to lose it. My pussy's getting wet from all this, and I'm barely holding it together with my sister right there, clueless.

Dinner finally ends, and Matt stands all awkward, muttering something about needing a cold shower. I laugh, and my sister tells him to go, while she handle the dishes.

Matt heads to the bathroom, leaves the door cracked like a total dummy. I bolt to my room, strip naked to my thong, and sneak quietly after him into the bathroom, locking the door behind me. Matt is already naked in the shower when I slip in, and his face is pure shock when he sees me naked, like he can't believe this is real.

I put a finger to my lips to keep him quiet, I step into the shower, and drop to my knees. His cock's already rock hard from all the teasing, so I know he's ready for me. I wrap my lips around the tip, teasing with slow, gentle suction, tongue swirling the head. He tastes salty, clean, and I feel him twitch. I look up, water dripping down my face, his eyes locked on me, intense, like he's desperate for a release.

I take him deeper, lips stretching around his thick shaft until he's at the back of my throat. I start sucking harder, tongue tracing the underside. Then he grabs a fistful of my wet hair, fingers knotting tight, and takes over. He thrusts with raw force, fucking my mouth like it's a wet pussy, his cock plunging in and out. Each thrust stretches my lips, the cock slamming into my throat, making me gag, eyes watering as water and spit drip down my chin. He's ruthless, using my mouth like a tight wet hole, and I'm choking a little but so into it, my nails biting his thighs to hold on. His grunts are low, barely covered by the shower, and I'm trembling, so turned on by how rough he's getting.

I pull back for a moment, and reach down to slide off my thong. I look up at Matt, eyes burning, trying to see if he's ready to fuck me. His eyes flare, cock jerking like he's about to say yes, but then there's a sharp knock on the bathroom door. My sister's voice cuts through the shower noises. "Matt, are you almost done?"

He gasps and yells with a voice shaky. "Almost there, babe!" I go back to work on his cock, and at that moment, he releases, hot and thick, flooding my mouth with a huge load of cum. I try to swallow it all, but his cock twitches out of my mouth and he ends up spurting all over my face. We don't say a word to each other, and I slip out using the door to my bedroom, covered with Matt's cum on my face. I end up rubbing his cum all over my wet body, playing with myself with his leftover cum, and go to sleep while his cum dries all over me.