In that moment, your main concerns seemed to be pushes away even further, uncaring about the possible implications of where this was going. You felt the dampness pooling in your insides and the heat irradiate from your newly acquired underbits. Another excited sigh escaped your full, plump lips, and you gave another wry grin, taking advantage of your power over him.
"... I guess it wouldn't hurt anything, getting expirience with women might give you..." you stood, disconnecting yourself from his rough, groping hands, and moving to lock the door. You turned, seeing your blonde locks ponytailed behind you, move to the back of your head with a swish. "... give you a competitive advantage if you know what you're looking at-"
With your left hand, you unbuttoned the fly of your washed jeans, and while he was busy staring at the third button being undone, revealing a set of plain tie-dyed panties beneath, you pulled the scrunchie out of your pony tail, letting your glossy blonde locks fall free. You felt alive as your pants dropped to the floor and your stepped out of them, your movements giving you a this subconscious 'bad girl' vibe that was so utterly delicious.
"Tell me..." your breathed, approaching the bed when Charlie sat, eyes wide open, leaning back, weight on his wrists, and pants noticeably tenting from his obvious arousal. "... little brother... I heard you had a crush on me and I... wanted to show you... more of me, to see if you feel the same way after you get the full picture. But, I'm so nervous... no one has ever seen me- like this. Are you sure?"
The words spilled out somewhere between seductive and clumsy, but definitely intentionally. Charlie nearly gagged, unable to speak, he nodded, your body's dirty blonde hair bobbing as he did so. The wrongness of the situation pushed you further, this erotic dirtiness spurring your sister's absolutely horny body and mind forcing you into making terrible decisions, combined with the teenage hormones that permeated your personality and an absolute disconnect from the consequences from these choices.
The panties dropped to the floor. You glanced down at yourself, as your fingers traced a line along your blonde pubic hairs, which showed faintly against your milky mound.
"Looks like you'll need a better angle..." you teased, feeling your fingertips touch a labia for the first time. "Back up to the edge of the bed, Jakey."
Charlie obeyed, scrambling to the edge of the bed. You felt your still impressive chest jiggle as you made a small jump into bed where he was just sitting. You looked down at him, biting your lip slightly, and opened your legs for him. You could see the sweat on his forehead pool as his face somehow became an even brighter red, your woman hood on full display.
"Now, sweet brother," you followed after a few moments. "Let me show you how..."
This was uncharted territory for you, or so it seemed. You had masturbated tons yourself, but never gotten a woman off, let alone with just your fingers. Again, it seemed your sister took over, going through the motions, spurred by Jake's eyes drilling into her. You deftly moved your painted nails, brushing against the slit, and the clean, glistening folds of your beautiful vagina. The dopamine hitting your mind over and over in small doses, before you finally plunged your first two fingers in. You gasped unintentionally, using your right hand to scratch the itch, hitting a very special spot over and over, causing your toes to curl, grabbing at the sheets beneath them. You added an extra layer for your own enjoyment, imagine strong Jake's hands kneading your breasts again, you pinched your own nipple with your left hand, before the bed began to shake.
"Oh!" You gasped, feeling the orgasm hit you like a truck, causing your mind to go blank. "Oh fuck, oh fuck, oh fuck!"
You let go of your body as the convulsions continued to wreck you, but the pleasure didn't seem to stop. You grasped at the frame of your bed and looked down, finding that you had a visitor between your legs. You grabbed his hair quickly, meaning to push him away, but instead you pushed him further down, feeling his curious tongue exploring where no man had gone before. Your legs wrapped around his torso as you began to rock rhythmically, using his inexperienced tongue to your own advantage, and finding yourself in the throes of orgasm again. Drool pooled at the edge of your lips as you cried out.
"Oh Jakey!" You screamed, hands full of tufts of your hair, "You're so good!"
Charlie stood up straight now, with a horny and determined face on. You looked him down, your hungry eyes following, seeing all of his clothes were now off. That cock, your cock, was fully erect, seven inches that waited for heaven.
At that moment you reached out and grabbed...