Someone once wrote "It was the best of times, it was the worst of times..." and that seemed to summarize how I was feeling. I had finally tasted the nectar that seemed so far away, but yet so close and I yearned for more.
I came home from working out, and Penny had left me a present. As I entered my room, my eyes immediately focused on the lacy black panties that were on display upon my pillow. As my gym bag hit the floor, my cock was in full swell. My heart pounded as my eyes focused what a wonderful present. She knew what it would do to me, and I was eager to comply.
Since I'd been caught by her, our dynamic had changed, and my deepest fantasies now seemed within reach. As I walked to my bed, my mind swirled captivated by the gift that had carefully been left for me.
The note simply read: "Enjoy. I did."
The panties were black, bikini cut, lacy in the front, and silky in the back. Closer inspection revealed a magical scent that was distinctly Penny's pretty pussy. The crotch was still slightly damp, and decorated with white matter that could only be cum.
As I held my prize to my nose, I realized that my right hand had found my throbbing cock within my underwear, and I was already caressing my member with purposeful aggression.
I licked the gusset of the panties, tasting Penny's cum, and my dick began to spill pre-cum all over my fingers. I took her panties away from my mouth just long enough to lick my fingers clean, only to quickly return them to my wanting cock.
"You like, panty-boy?" said the voice behind me.
As my balls boiled, I could only sigh, "yes. Thank you."
"Good. Lay down." The voice instructed.
As I did, pretty Penny came to me, wearing only a t-shirt that came down just below her waist, and her panty covered pussy straddled my right thigh. My leg hair seemed to be electrified and my skin sensed every silky fiber of the damp panties that covered the moist, delicate, beautiful object of my desire.
For an instant, there was a pang of guilt as I thought, "This is my sister." But that brief moment of hesitation only served to fuel my lust. Not only was this my sister, but this was the object of my most private fantasies ever since I noticed the diminutive swellings beneath her t-shirt that would go on to blossom into her now perky 34b titties, sporting nipples hard like number two pencil erasers, protruding through the fabric of her shirt. My cock ached, and I would have done anything she asked. Anything.
I inhaled her scent from her panties again, and looked down to see the white lace that covered the auburn wisps of pussy hair which ground against my muscular thigh, flexing to provide friction against her swollen clit and labia. My mind felt wicked, and my eyes roamed from her damp panty-covered pussy, over the t-shirt that covered her toned, tanned tummy, up to the erect nubs that pressed out to greet me, over her sensual jaw line, to her emerald green eyes that engaged me with a stare so full of lust I could have cum right then and there.
"Show me. Do it for me" was all the encouragement I needed.
Penny had been leaving me precious gifts in unusual places since our encounter a few weeks ago; in my car, in my gym bag, in my room. Without fail, my cock would become rock-hard, and I couldn't resist my need to stroke my cock with her pretty panties until I my balls would boil over with cum.
I was well and truly captivated.
As she slowly, deliberately, humped my thigh, my tongue lapped at the silky black panties that my left hand held to my face. My right hand struggled to get my shorts and underwear down below my clean-shaved balls so I could have free access to my aching cock.
Penny's beautiful auburn hair framed her face and as her eyes burned into my soul. My breathing became deep and ragged. I'd been jacking-off to her image for as long as I could remember, and now her soft, silky skin caressed my thigh, and for a moment, I actually questioned whether or not I was dreaming.
As my hand tugged on my stiff prick, I felt her lean forward to steady herself as her legs tensed and clamp down on my thigh. As she began to quiver, I felt my balls tighten, and my stomach clench jet-after-jet of jizz rocketed from the tip of my dick. The first strand landed square on my cheek, the second hitting me just under my chin, and the third and fourth drained onto my chest.
"Oh yesssss." She hissed as her juices flooded through her panties, coating my leg.
Penny's pussy was soaking wet, and my dick barely softened. Penny ran her tongue over my hairless chest, collecting as much of my spunk as she could, then she leaned to me, kissing my full on the lips, sharing my cum with me. I ran my fingers through her hair, and over her muscular back, as I eagerly drank down my seed.
Abruptly, she sat upright, "Come on, you're going shopping with me," she instructed.
I feigned objection for a moment, but then easily gave in. "Where are we going?"
"You'll see," she beamed in a radiant glow that I've only ever seen her possess.
She used her black panties to wipe my cum from my face and chin as she said, "Come here." She lead me to her room, where she went to her panty drawer and pulled out a sexy pair of white, nylon panties with red hearts all over them. "Put these on" she instructed.
As I extended out my hand and took the pretty panties, I gave her a bewildered look.
"You heard me. Put these on. We're going shopping."
Without objection, I took the panties and headed to my room, my hard dick bouncing before me with each step. I resisted the urge to wrap the panties around my cock. Instead, I slid my feet through the leg-holes, feeling the delicate material against my skin, pulling the dainty panties up until the material strained to cover my rock hard dick. I had to tuck the head down to the left to try to get everything in place. The material between my legs and over my ass strained to conform to my shape. My heart was pounding over the prospect of wearing these forbidden treasures in public, and I was delirious with anticipation.
I wanted to cum again so badly, but it was so thrilling to save the sensation, I just stood staring at my cock throbbing against the silky material. I turned to notice Penny wearing a pair of short, pink athletic shorts and a skin-tight white tank top, and given the appearance of her still erect nipples, apparently no bra.
"Whaddya think, panty-freak? Do they make your dick feel nice?"
Breathlessly, I stammered, "They're fantastic."
"Good. Put some shorts on, we're going shopping."
Forty minutes later we were standing at the threshold of Fredericks of Hollywood. The silk of my panties caressed my now perpetually hard dick, and my senses raced, as my sister took me by the hand.
"Come-on, this will be fun!" Penny said with a sparkle in her eye.
With each step, the khaki of my shorts rubbed against my panties, and I could feel the pre-cum oozing from the tip of my hard dick. As we approached the first table covered with panties, Penny said "Help me find something pretty, something that you can't resist." My eyes scanned the table, and my mouth went dry.
"It makes you horny just to be in here, doesn't it?" she whispered to me as she noticed my cock straining against my shorts.
