I couldn’t pretend to be asleep anymore. I carefully opened my eyes. My sister didn’t notice, because she was entirely focused on what she was doing.
And what she was doing… and even more so, what she was wearing… exceeded my wildest expectations. The only problem I faced was what to focus on.
First of all, as my sister sat there quietly straddling me, she was stunningly topless. My second opportunity to stare unashamedly at her perfectly-formed bare breasts was somehow even more exhilarating than the first.
Secondly, my earlier theory about why her legs didn’t feel like bare skin was correct: to my erotic delight, a sheer pair of thigh-high stockings were gift-wrapped around her beautiful legs… successfully satisfying yet another fantasy.
The third and final thing that captured my attention, however, was the gratifying identification of the silky texture that had been — and still was — sliding up and down along my cock: a skimpy piece of fabric nestled in between my sister’s thighs.
My gaze settled upon the scant evidence of a sexy black thong that disappeared into her hidden valley. With its pair of strings on either side that wrapped around her hips, it looked incredibly amazing on her gorgeous figure… and it also looked somewhat familiar.
By that time, my sister had apparently noticed my eyes roaming lustfully all over her mostly-naked body… and she accurately discerned my unspoken question about her thong.
Breaking the silence, she explained: “I had nothing sexy to wear, so I snuck upstairs the other day and found this stuff in your wife’s underwear drawer… I hope you don’t mind that I borrowed it.” She laughed nervously. “Or that she notices.”
My wife hardly ever wore lingerie. I couldn’t recall if I had ever even seen that particular thong on her, or simply recognized it from seeing it sitting unused in the drawer. Either way, it was finally being put to very good use, accentuating my sister’s sexiness even further beyond what I thought was possible.
Softly, breathlessly, I responded: “You are the most beautiful… sexy… and attractive… and most desirable woman that I have ever seen in my entire life.”
Up until that point, my sister hadn’t stopped sliding her wet thong-covered slit up and down along the length of my cock… but she paused briefly at that comment of mine. She could tell I was being completely genuine.
“Thank you,” she whispered. After a deliberate pause, she added: “I love you, brother.”
We had said a lot of things to each other the last several days, but nothing seemed to carry as much power as that statement. We’d always said that to each other growing up, but this time it felt different. I suppose it would sound different, when it’s coming from your sister as she’s straddling you and grinding against your cock wearing nothing but a silky thong and thigh-high stockings…
“I love you too, sis.” I meant it… in ways that I was just discovering.
“How much do you love me?” she asked softly.
“A lot,” I said. We stared deeply into each other’s eyes, and time seemed to stand still.
… but she was too horny to let that intermission last for very long. As she resumed rubbing herself against my fleshly pole, she slowly turned the sweet back into the sensual. “Tell me, brother, do you love me when I’m naked?”
“Absolutely,” I breathed out. “Your body is amazing.” I was infatuated with the view of her breasts swaying beautifully as she calmly thrusted her hips back and forth.
“Tell me, brother, do you love it when I rub my girl part against your boy part?”
“Uh-huh.” I also loved how she was firmly grabbing my ‘boy part’ to steady herself against it like a bicycle seat. I told her that, and she smiled.
“Do you love how enjoyably we make each other cum?” She bit her bottom lip.
“There’s nothing better,” I responded. I truly meant that. Between her passionate enthusiasm, her incredible beauty, the confidence that she had in her own skin, her lovemaking skills, her sense of adventure, and — on top of all of that — the additional rush that came from the forbidden nature of our sexual relationship… I had never experienced so much pleasure with a sexual partner.
She abruptly shifted the conversation from questions to statements. “This is the closest my pussy has ever been to your cock,” she declared.
I was very much aware of that. I stared at the tantalizing sight of her crotch sliding up and down along my rod while she cupped it tightly with her hand.
“I see that,” I said. I posed a question: “And tell me, what exactly are you doing with my cock?” I knew what she was doing… I just wanted to hear her say it.
“Mmm… well, I am grinding on your big hard cock,” she replied seductively. “I’m pressing your thick cock in between my thirsty pussy lips.”
“Oh yeah? And why are you doing that?” I pressed her.
She gladly took the hint. “Well, brother, I’m doing that… well, because I want to use your big fucking cock to make myself cum. I’m so fucking wet, and these stolen underwear are so fucking thin, it almost feels like you’re actually touching me.” She started grinding faster. “… and that makes me really fucking horny, and really fucking ready to cum on your cock. Really soon.”
Around the same time that she uttered the words “really soon,” though, something else happened… something that I don’t think either of us had expected.
Apparently, she had slid forward farther than her previous range of motion… because when she slid back, my tip poked her hard pubic bone and redirected itself… in a direction it had never gone before. Ever.
She froze in place.
Time seemed to stop once again.
Technically, I hadn’t penetrated her — the silky fabric was acting as a thin barrier between us — but we both realized that my head was pushing into her entrance.
We made eye contact with each other. It was the most intense eye contact I’d ever experienced. Her face displayed a mixture of alarm… and surprise… and desperation. Neither of us said a word.
After what felt like an eternity of motionlessness, my sister rose up from her knees very gradually. She moved just enough to make my cock fall down out of its trap… but no further. Her thong-covered crotch still hovered no more than an inch or two above my manhood.
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