As your breath runs out it only grows.
She watches as your precum becomes almost a constant thin stream - covering her hand still pinching the base of your throbbing cock. She can practically see the steam in the sunlight - her brother must be very hot inside indeed.
You're about to pass out from your sister's thighs. Worse - you can tell that you're about to finish despite her torture. It would be the final humiliation; you could never look your family in the eyes again if they knew you'd sooner fall unconscious under your sister's butt than not love it. Desperately you part your lips and your tongue shoots out. With a long pervasive lick you scoop up her juices from taint to swollen clit.
Her thighs tense so hard you think your face might be crushed. For a moment she lifts off you enough to breath in air. Everything smells of her when you're this close and intimate.
"You ass!" She complains. "No-one's ever touched me down there before. Did you really just lick me?" She straddles your face once again but you've discovered her weakness. More punishing lashes of your tongue have her almost sobbing atop you as she still refuses to get up. You trace around and then across her lips - teasingly nearing her more sensitive parts. Occasionally you pause to scoop up all her arousal that gathers - if only to keep breathing. Pressing into her entrance her eyes widen as she realizes her brother had just taken her virginity. You don't hesitate to tongue fuck her tight hole wondering how it would ever fit your cock inside it. She feels something building all over her body but she doesn't know what to do or how to stop it. You know what you want instead.
You withdraw for a long tortuous moment without movement. Slowly you move up as she gibbers non-sensical complaints. You flick her clit with your tongue.
She orgasms immediately. She shuts up as it intensifies to an almost-torture; your lips suck on her girly nub as your tongue flicks it quickly and cruelly. Her entire body shakes as the waves of pleasure ruin her dignity. She doesn't want it to end - she wants to keep you under her for as long as she lives.
In her distraction you slip out from under her. She lets go of your now-engorged cock as you shove her down in front of you and kneel over her gorgeous form.
Your untouched length finally lets loose. You aim over her winking pussy until it's covered in a white glaze then grab her arms and move over her face. You cum longer and harder than you ever have before. Your hot strings land across her cheeks and panting lips - you know she's gotten a taste - even making a mess of her hair. Almost unconsciously her hand reaches for your sensitive pulsing balls and massages them gently. She coaxes out the rest of your gift into an open mouth and stuck-out tongue - looking like a whore.
You snatch up her smartphone as you finish. She falls back - her first orgasm slowing as well. You snap a photo of her messy face and a short video of her lying back. She's so out of it she barely realizes.
"Enjoy the new look princess" You mock while turning her phone screen to her. "White looks good on you - shows us all what a slut you are inside." She blushes and you toss the phone beside her - she'll have to look at those and delete them herself later.
You leave her in a shameful heap on the bed. You think it's over after this as she realizes it's only begun.
