Embarrassed, Nude, But Not Female

"I hope you don't mind that I called some girlfriends over," your sister says, walking around to your front. "It's just that I thought it was my responsibility to sort this...situation of yours out." As she comes into view your eyes rove downwards and you feel your cock re-harden

She puts her hands on her hips, and something about the sharp protrusions of the bones jutting out from just under the skin makes you swallow hard. It's taking everything you have not to stare openly at the puffy pink slit of her pussy, though Christie is doing a good job at tugging your attention away, bending over the kitchen counter and pushing her fat, juicy peach of an ass out for your benefit. She pats it alluringly and rubs the tasty-looking expanse of cheek in a small, circular motion, while between her legs the butterfly wings sit, folded together neatly with the lips on either side; the enticing, blush-coloured treat is all soft, angelic-looking folds, topped off with a light sheen of moisture that makes the whole thing glisten prettily under the kitchen lights. If there's a prettier pussy out there, you've never seen it—even in your extensive travels of the seedier sides of the internet—and you can't help but imagine tonguing it, drilling into it, kissing it over and over again. Above all else, you wonder also how it tastes. Christie catches your eye and, smiles as if reading your mind. "Been feeling a little insecure lately," she says to you over her shoulder, a section of her hair cascading over her right eye in a blonde wave. "Danny tells me my pussy's disappointing. He says it looks like it should taste like fairycakes, but..." she pouts. "Well, I'd rather not dwell on him. What do you think, big boy? I'd ask you to cum once for yes and twice for no...but your thing seems a little too overeager for that approach to work." She wiggles her hips and the butterfly wings wobble. Your cock's so hard now it almost hurts. "Plus, you really seem to like your girls insecure, don't you? Maybe you'd prefer if I—" she slides a hand down between the furrow of her buttocks and shields her pussy from view. "Oh, no...how did I end up like this? All...nakey wakey, and in front of a boy!" She's doing an insipid, baby-ish voice that sounds quite different from her own. The pantomime ENF routine appears to inspire Penny, who goes up behind Christie and grabs a handful of the blonde's long locks, gives you a wicked grin, then starts administering a series of light, teasing slaps to the other girl's ample rear-end.

"Oh! Oof! Ooh! Ah! Eek!" Christie's delicious bottom wobbles and wobbles, though she seems to be putting a little extra pep into it on purpose, bouncing up and down on her feet and giving it a shake to coincide with each strike. She's making a show of it, pursing her lips and batting her eyelashes as she looks back at you—the picture of demure embarrassment. The weight of a fingertip pressing down on the head of your cock brings your attention back to your sister, your last bit of ejaculation is still so recent her touch sends a spasm of sensitivity pulsing along it. "Probably wondering what this is all about, right? Why I invited Christie and Penny over like this?" Her fingers curl around the bell-shaped head, an obvious bulbous protrusion she manages to easily get a grip on, even through the material of your boxers. She gives it a gentle squeeze and you're **** to gasp at the accompanying jolt it causes. "Y-you're...cut it out!" You stammer, trying to push her away, but when your hand brushes hers, it only makes you harder and pushes your cock more firmly into her grip. "Or what? You'll spurt in your pants again?" There's a mocking twinkle in her eyes, it somehow makes it difficult to break eye contact with her, so that by the time you register the soft footsteps slapping on the floor behind you, it's too late. Penny slides a pair of scissors into the waistband of your boxers and snips them down their entire length. Your hands instinctively go down to stop her, but she whips the boxers off of you quick as a flash, and all of a sudden you're bottomless in front of your naked sister.

"Fuck!" You yelp, folding your palms and fingers awkwardly around your erect cock to hide it from your sister, your cheeks growing hot in concert with the whole routine. Shame overwhelms you, it's one thing to be seen with no undies on by your sister's cute friend—and bad enough at that—but to be panstless in front of said sister herself? **** to see her smug, satisfied expression as you press down on your ever-rising prick, which is paradoxically becoming more insistent on saying 'hello' the more embarrassed you become. She adopts a satisfied expression. "Why so shy? Not like we didn't used to take baths together all the time anyway, and besides...you've already seen everything of me!" She gives one of her tits an illustrative flick. "What's the matter? Em-ba-rrassed?" Before you can reply she surges forward and throws her arms around you, drawing you into a long—and deeply wrong—kiss. Your eyes bulge in surprise and your protective grip on your cock momentarily slackens, giving your sister an opening to slide it between her thighs and move them back and forth over it several times in quick succession. She's so...warm, you think, before a note of panic goes through you. "N-no..." you moan, as another weak pulse goes through it at that, and you wince at the feeling of another thin glaze of cum spurting out of you, slathering her shapely, slightly plump thighs. She breaks the kiss off and looks at you, her face perhaps an inch or so from your own. "How could you?" She whispers. "Jacking off on your own sister like that? You're..." she presses her breasts into your chest and reaches down to give your ass a hearty squeeze. "Filthy. A filthy little perv who gets off on girls losing all their clothes. Do you like it, being on show? How does it feel?"
You can't even bring yourself to answer, for the faint stinging on your cock and the not-so-faint burning on your cheeks. This is...she can't be... You cringe and push your knees inwards, a shiver of humiliation running down your spine at the sensation of your hot, hard and mortifyingly naked cock brushing against your bare legs. As one, the girls giggle, and in response it winds a tad further upwards, in spite of the waves of shame that keep coming over you, or maybe...because of them?