My heart sinks like a stone as I realize there's no way to explain this situation without causing a huge mess. "Just a sec," I mumble, then I open the door and let her in. She glances at us suspiciously, clearly picking up on the tension in the air.

"Everything okay?" she asks carefully.

I force myself to nod, forcing a smile onto my face even though I feel like I might be sick. "Yeah, just... talking late, you know." While Nikki is on her knees behind the kitchen counter, she's out of sight, and I'm standing alone in the kitchen for my sister. She can't see Nikki.

I clear my throat awkwardly. "Uh, well... I was just heading to bed myself... You want anything, or should we call it a night?" There's an unspoken agreement between us that neither of us wants to discuss what just happened any further.

She hesitates for a moment before shaking her head. "No, I'm good. I just wanted to make sure you were okay." Then she turns and disappears down the hallway, leaving me alone with my thoughts... and Nikky.

Her lips are soft and sweet against his, making it impossible for him to think straight. He deepens the kiss, hungry for more, as his hand finds its way under her tank top and cups her breast over her bra. Her nipple hardens instantly beneath his touch, sending waves of desire coursing through his body.

He breaks the kiss long enough to look into her eyes, wanting to make sure she's okay with this, but all he sees is desire mirrored back at him.

He nods, unable to speak through the haze of lust clouding his mind. His other hand moves down between their bodies, pushing her panties aside before sliding a finger inside her wet heat. She gasps into his mouth at the intrusion, arching her back off the bed. He thrusts his finger deeper, finding her rhythm as he continues to kiss her passionately.

His cock is rock hard against his boxers now, straining for release.