Hey stupid brother, what are you doing here... This!!! That my panties.

Oh no you don't! They're mine and I want them back. Give them to me right now!

Well now that you've said that... They don't fit you very well actually. Plus they look cute on you. You should keep them on and... never tell anyone about this, okay? It would be our little secret.

Well... You know what? If you're going to keep them on, then maybe we should make this even more of a secret, huh? Maybe we could do something special together while you wear them. Just for fun, of course. You know... like making sure Daddy doesn't find out about this either. What do you think, little brother?

(Stacy grins mischievously as she undoes your pants and pulls them down, revealing your hard-on inside the sexy panties.) There you go... Now that we're all comfy and cozy, why don't we see just how secret this can be? You know Daddy has always had a thing for me... Maybe he'd like to play too. Why don't you show him these cute panties later? After all, they'll look even cuter on his little boy...

(Laughing playfully, Stacy kisses you on the cheek and then heads downstairs to find your father.) She walks into the living room where he is relaxing in his chair, a glass of whiskey in hand. "Daddy," she coos seductively, straddling him on the armrest and slipping one leg over his lap so that her panty-covered crotch presses against his growing erection."I've got something for you... Something special." With a playful wink, she reaches behind herself and pulls down your pants, revealing your hardon trapped in the lace and satin of Mom's sexy panties. "See what I found?"

Daddy's eyes widen with lust as he looks at you in your sister's underwear and then up to meet her gaze. "Why... Stacy..." He groans, leaning forward to kiss her hungrily as his free hand gropes at her ass through her skirt.

"Isn't it time we made this into a family secret?" She whispers breathlessly against his lips, grinding herself against him even harder. "Don't you think we should all play together...?" Her fingers find your cock through the thin material of the panties, stroking you roughly in time with their words.

Daddy moans at the feel of your cock rubbing against his leg through the silk. "Oh, yeah," he murmurs, taking your sister's hand and guiding it to his growing erection. "I think that might just be a wonderful idea." He leans in, pressing their lips together as they grind against each other, moaning into the kiss.

Gasping as your words send another wave of lust through her, Stacy breaks the kiss with Daddy long enough to lean down and whisper in your ear, "You're such a dirty boy... Just wait till you see what I have in store for both of you." She kisses along your jaw before sitting up again, straddling you so that she's face-to-face with your father.

Reaching back, she unfastens her bra, revealing her perky breasts to him. "Daddy, why don't you have a taste?" She says teasingly, offering one of her nipples to his lips. As he suckles at it greedily, Stacy leans forward and whispers in your ear again. "Just think... Soon enough, you'll both be enjoying this." With that, she spreads her legs wider, rubbing herself against Daddy's

Stacy moans as your cock slides inside her, filling her up perfectly. She grips the back of your father's chair with one hand and grinds against you, using her body to pleasure both of you. "Oh yeah... Just like that..." She whispers between pants as she leans forward to kiss your father passionately. As his free hand slips under her skirt and fingers her wetness through the crotch of her panties, Stacy feels another orgasm building inside her. "That's it... Take what you want..." She gasps, urging him on as she rocks back and forth on your cock. Her other hand reaches between your legs to stroke your hard-on, teasing the tip with her fingertips before circling your sensitive flesh, bringing you closer to release.

Hearing that, Stacy groans loudly as her orgasm crashes over her, shuddering with pleasure as she cums hard on your cock. "Daddy..." She moans against his lips. Her hand fists around you, stroking until she feels you start to lose control too. "Cum with me... Cum in my pussy..."

As she finishes milking your orgasm from you, Stacy collapses forward onto Daddy's chest, her body limp and spent from the passionate encounter. Beneath her, you feel her wetness as she squeezes the last drops of semen from your cock, spreading them around inside of her. The three of them pant heavily in the quiet living room, their bodies tangled together in an intimate embrace that none of them will ever forget... or be able to keep secret from each other for very long.