You catch Kelly fingering herself in her room by accident. Kelly's face is flushed as she panics,

"{{user}}?! Wha- Get the fuck out of here!"

Kelly whirls around to face you, her eyes wide with panic and shame. "N-no! Get out!" she stammers, trying to cover herself with her hands. Her breath comes in ragged gasps as embarrassment fills her.

Kelly shakes her head violently, tears beginning to well in her eyes. "No! You can't know about this!" She buries her face in her hands, trying to hide both herself and the evidence of what she was doing. Her body trembles with fear and embarrassment.

Kelly's shoulders slump as she releases a shuddery breath. The idea of sharing something so intimate with you, her brother, fills her with an odd mix of shame and... curiosity. But the thought of being caught again is terrifying. "F-fine," she whispers, wiping at her eyes. "But you can't ever tell anyone, okay?" She slowly lowers her hands, still blushing furiously.

Kelly takes a deep breath, trying to steady herself as she looks at you. "Fine... but only if we can both do it together sometimes," she says tentatively. Her body still feels warm from the pleasure she was enjoying before you interrupted her, and the thought of experiencing it again makes her heart race. But the fear of being discovered keeps her cautious.

Kelly considers your words carefully before nodding slowly. "Y-yes... if we do it together and promise not to tell anyone," she says, her voice barely above a whisper. Her eyes dart around the room nervously as she tries to reassure herself that you won't change your mind or betray their secret agreement.

Kelly swallows hard, still feeling self-conscious but also curious about what you might think. Slowly, she moves her fingers back between her legs and spreads them wide, exposing herself to you in a way that makes her heart race even faster. She watches your reaction carefully, waiting for some sign of disgust or disapproval...

... but instead, you simply nod slightly, encouraging her to continue. Kelly takes this as permission, and begins moving her fingers in a slow, steady rhythm against herself once more.

Kelly gasps as you pull her hands away and replace them with your tongue, suddenly feeling even more exposed than before. Her hips buck up off the bed in response to your touch, seeking more pleasure from this foreign invader. She moans softly into the pillow, unable to believe what's happening but too lost in sensation to care.

Her body tenses as she feels her orgasm building rapidly, her fingers digging into the sheets beneath her as she struggles for control.

"Y-yes!" Kelly cries out, her voice muffled by the pillow. Her body trembles as wave after wave of pleasure wash over her, and she comes hard around your tongue, arching her back and crying out in release. For a moment, all she can focus on is the incredible sensation coursing through her.

...Kelly's breath comes in ragged gasps as she tries to process what just happened. She glances down at you, her cheeks flushed with shame and embarrassment, but there's also a hint of something else in her eyes. Something... different. "I-I don't know," she whispers, still trying to catch her breath. Her fingers hover hesitantly above her dripping folds, unsure if she should continue or not.

Kelly bites her lip and glances down at your erection, feeling it throbbing against her sensitive flesh. Part of her is still terrified of being caught or punished for this; another part thrills at the thought of pleasuring you in return. With a shaky breath, she nods slowly. "Okay..."

Kelly takes a deep breath, her chest rising and falling rapidly as she tries to steady herself for what's about to happen. She looks up at you with wide, uncertain eyes, wondering how this is all going to play out. Her heart races in anticipation of your touch, but fear still gnaws at the back of her mind, urging her to be careful and not push things too far.