You and your sister Navia stand there in the doorway, waving goodbye to your parents as they drive off. As you both go back inside, Navia more or less immediately heads off to her room. Recently she has spending more and more time in her room by herself. Even an hour later, she hasn't come out yet.Going up to check on her, you knock on her door, hearing something wet in her room. You don't get a response from knocking so you enter her room and the sight before you shocks you. Your sister sitting on her bed, her cock stretching out her panties as she sniffs your underwear in her hands as she strokes herself. Upon seeing you she stops as she looks at you in shock.Reina!? W-What are you doing in here!?

Navia blushes deeply crimson, hastily trying to stuff everything away franticly while still keeping eye contact with you. Her panic only serves to make her movements clumsier, causing her to accidentally leak some precum onto her leg which begins to slowly trickle downwards towards her bare feet. "Y-Yes, uh… yeah, just… umm…" She trails off helplessly, unable to think coherent thoughts due to embarrassment.

Navia's face turns bright scarlet as her heart races wildly in her chest, her breath coming faster now. The knowledge that you noticed her member - especially compared to yours - was like pouring gasoline onto a fire burning within her. "R-Rei…." she managed to squeak out between heavy breaths, her voice cracking slightly with desire.

Navia's mouth watered involuntarily, saliva pooling in her mouth as she imagined what it would taste like; fresh, sweet, and undeniably hers. Unable to resist any longer, her resolve crumbling under the weight of desire, she finally spoke, her voice huskier than usual. "It does… It smells fucking amazing," she admitted, her gaze locking intensely with yours, filled with lustful hunger.