Lisa’s Evolution Pt. 01: The Depth

"So Jackie," she began using the version of my name she seemed to reserve for when she was up to mischief or in need of a favour, "Why haven't you asked me why I'm wearing lingerie today."

Oh shit, I thought. The fact that girls could easily and always read the minds of men was diabolical. God is clearly a woman.

"Uh...not sure. Did some new boyfriend buy it for you?"

"Oh, please," she mocked. "I'm still single. The guys at my uni are all such pervs. They are always trying look down my top at my tits or get me drunk so they can get into my panties. They certainly aren't trying to buy me any of Victoria's Secrets." Lisa laughed at her clever turn of phrase.

Keeping thinking about football, came my mental mantra reminder. But damn, I was a curious boy and asked, "So... you haven't let them do either?"

"Not yet," came an immediate and proud reply. "But, it's kind of sad, I know," she confessed upon further reflection. "Especially sad, to be honest, since I've been so damn horny lately. Not sure what's going on with me." She laughed at her own bluntness, but I was shocked for the second or third time today (I lost count). We had previously talked in general about our respective romantic relationships, but never the intimate details. And did she just tell me she was still a virgin? I was fairly sure she was when she graduated high school based on comments she had made back then about waiting for marriage or the right guy (bla-bla-bla). But I had just assumed a lovely girl like Lisa, even a romantically awkward one, would have lost their cherry after two years of university.

"But..." she continued, as she looked down her chin at her lacy bra-covered tits that protruded outward in a heavily sexual manner, which contrasted so naughtily with an otherwise innocent-looking teen body, "I have been saving these 'gifts' for the just right boy, Jack," she told me as she moved her dark brown eyes back to mine.

Jesus H Buddha. Was I the 'right boy'?

I'm sure I had a full-on-nerd grin stretched across my face as I felt like a chivalrous but very horny knight looking for something interesting in the distance to reinforce my resolve. Lisa, ever the observant 'lawyer,' noticed I was avoiding looking at the subject of our conversation: her gift.

"It's ok Jack, you can look at them," she said in a tone one might use when talking to a frightened child or when dangling a string in front of a kitten. "I know you're a gentleman," she continued. "And I've been asking myself recently, why should I feel pressure to let some pervs at university be the first to enjoy them? Why not share them with someone I have respected and cherished and loved for so long? Even if he is my big brother. Unless, of course, you don't like them."

Oh, sweet Jesus.... football.

"No-no, Lisa," I hurriedly said to remove any doubt about my thoughts on her beauty, all the while trying to process the implications of her loaded words. I quickly accepted her voyeuristic offer and looked directly at my little sister's chest. Lisa, still enjoying her mounted position on me, smiled knowingly as she saw my eyes shift and focus.

God, I just loved how her big tits were sloping upward so firmly from her body right toward my face, with nothing but sheer blue lace separating them from my eyes and from my mouth. I also noticed how this deliciously transparent bra was the only barrier (or was it an invitation) separating our longstanding friendship from a descent into something more wicked.

I couldn't help but feel both guilty and enticed by how Lisa's now wet and semi-exposed tits looked far too big for both her slender young body and far too big for any 'little sister.' Half of my brain still registered Lisa as that innocent girl I first met and became friends with. But the other half was now seeing this developed girl with big sexy tits that looked like they were demanding attention.

And she must have known this all along, I thought. She must know how much guys get turned on by big firm tits, especially on the skinny body of a teen girl like her. And she knew, regardless of the fact that we were best friends, I couldn't help but want to see her tits when teasingly exposed in such a naughty way. I am a man. She knew she would turn me on with her sheer lingerie-wrapped tits, and that I couldn't possible resist her offer to enjoy them. And this made her 'gift' of sharing them with me all the more naughty. And with this confidence, she clearly wasn't waiting for me to ask, she was just giving me my present, ready or not.

"I do like them, Lisa. They are very pretty," came my weak reply.

"Them? Pretty?!" Lisa shot back, in a somewhat disapproving but playful tone. Not the answer she was looking for, I guessed. "You can call them tits. I'm not a kid anymore, big brother" she playfully scolded.

"Um, yes, your tits are pretty, but also sexy. Actually, ok, your tits are amazing. Just like you," I quickly added at the end in an attempt to soften my initial confession that may have come off sounding a bit pervy; I suddenly wanted to keep being the 'right boy' in her eyes. But her next question made me realize she was giving me the green light to be fully honest, and maybe even a bit naughty.

"What about my nipples, Jack?"

As she asked, she squeezed her athletic thighs and legs on my hips and back just enough to cause her vulnerable panty-covered pussy to push forward an inch or two and press against my hard abdomen. In response to the naughty words and the feeling of my 'little sister's' thinly veiled pussy now deliberately pressing up on my stomach, my cock twitched and grew harder despite my best efforts at self-control. It was about to make contact with her bottom, I realized. It was then that I surrender to it and to the moment.

I looked directly at Lisa's jutting tits just inches from my face and confessed in a rather husky voice, "Your nipples are perfect, Lisa. So big and so long. They look like they are aching to be sucked." As my words fell out of my mouth my cock took it upon itself to press against the side of Lisa's bottom and along the upper part of her leg.

"Oh my," was her reply. I wasn't sure if it was in response to my words or my underwater probe. "It looks like you have gotten bigger as well," she continued in obvious reference to my earlier comment about her. Her teasing continued. "Are you trying to poke my bottom, sir," she said in mock formal language.

I'm sure I looked bewildered, guilty, and semi helpless. And as if to tease me more, to push me more, she leaned in close to my ear as if to tell me a secret, and in doing so the side of one of her lovely breasts briefly rubbed on my face. Oh god, I wanted to squeeze and suck them, sister or not.

"You know Jackie," she whispered in the exact same innocent little girl voice she had before, I had one football player at university tell me he wanted to put his big cock all the way up into my little bottom."

My mind reeled and my cock jumped at these shocking and deliciously naughty words that clearly were meant to arouse me or torment me or both. My twitching cock expanded and now pressed urgently against Lisa's bottom as if trying to find more space to grow. Lisa, with a knowing grin, obliged it. She pulled her hips away from my lower stomach so that my erection could range free and rise up along the middle of my abs. I was grateful for this release until I felt the head and part of my shaft actually push past the tops of my shorts to escape fully naked into the water (I should of tied the trunks), which -thank god- was high enough to easily cover our lower bodies and then some.

Lisa, after a moment, and while looking directly into my eyes, slowly and gently attempted to return her hips back to where they had been previously stationed on my lower abs. But with that movement, her little panty-covered pussy now pressed ever so lightly - but unmistakably - against the exposed part of my now almost fully erect cock. While I stopped breathing for a moment, I saw Lisa inhale sharply and her eyes flash wide with recognition as her innocent pussy gingerly made contact with my cock through her panties. I could actually feel the lace and the softness her tiny pussy beneath it right on the skin of my engorged shaft.

My god it felt so good and so wrong all at once.

My cock twitched from this taboo lacy contact, and as it expanded to its fully hard state, I felt Lisa's body tense as a slight vibration ran through it. All the while she kept the crotch of her thin panties and the treasure behind it exactly right where they were causing me so much delicious desire: ever so lightly making contact with my now rock hard shaft.

We both remained perfectly still. Neither one of us spoke nor acknowledge what had just happened. She looked into my eyes with a satisfied smile on her face, but there was also a flicker of lust, and I could see her breathing was just a tad bit more noticeable now as her breasts rose and fell slightly. As for me, I was still holding my breath in fear I might shatter this surprising and naughtily surreal moment.

We both remained perfectly still.

"Am I hurting you," she asked after a long, long, long pause, and with a voice that was less steady than before but still in control. I knew it wasn't a real question as Lisa wasn't placing any of her weight on my vulnerable bits: my cock and balls. Rather, her weight was carried partly by my hips, which her legs wrapped around, but mostly from the buoyant force of the water. Her question was really a discreet acknowledgment to me that she knew exactly where her pussy was positioned. It was an indirect calling out of the elephant in the room: a little sister's pussy -with nothing but thin lace to protect it - was ever so delicately touching against a big brother's rock hard cock. And Lisa wanted to signal to me, without actually acknowledging it, that this wasn't an accident; she was going to keep her vulnerable little pussy right where it was on purpose, ever so gently touching and teasing her big brother's cock through the thin material of her girly panties as she straddled him in the water.

We had clearly crossed a boundary and were now in virgin territory.

We still didn't move a muscle, but I could feel an ongoing throb in my loins in response to Lisa's intoxicating boldness: she was letting me feel her panties with my exposed cock. Throb.

"No, you're not hurting me." I replied, my voice husky, and not so steady. "You feel good," I continued, while my mind processed the fact that my fully submerged naked cock was touching the exact same thin lace panty strip that my 'little sister's' pussy was touching. And as I looked into her gorgeous, young, inexperienced, but mischievous yes, I felt --perhaps for the first time in our friendship- just how intently she was watching me, and just how connected she was to me. I had to look away.

While Lisa seemed to retain control during this surreal encounter, I felt like I was losing it. My mind and body, which had so quickly become completely aroused, found it so devastatingly erotic and taboo for Lisa to be teasing me like this with her big tits, her sexy panties and her virgin pussy. It was so hot to realize that she fully knew that her 'gifts' were making my cock so hard. And, in spite of this explosively taboo energy, we had to remain so quiet, so motionless, and so restrained as if not nothing potentially explosive was happening right here in this pubic lake between 'brother and sister.'

Her actions, her teasing, her body arched out before me and her legs around me, all held me in such deliciously sexy grip. They held me so tight while she maintained the gentle but constant pressure of her innocent panty-covered pussy against my aching hard cock. With her eyes on mine, I couldn't move a muscle, but I was starting to feel like I needed to ravage my little teasing sister.

I tried to focus my thoughts and senses away from the 'elephant.'

I felt the warm late afternoon sun. I felt the slightly cool late summer breeze blow over our exposed skin, and I felt the warmth radiating from our intimately close bodies shielding us from it like a canopy. I felt the slight weight of Lisa's golden brown arms as they rested on my shoulders and her hands dangling behind my back. I felt her long well-toned legs wrapped around my hips, and her firm calves pressed into the sides of my back with her feet crossed behind me. I felt the much heavier weight of her stare; those dark brown eyes looked more confident, more curious, and more locked on than I had ever seen before. We held this wickedly intimate position with neither one of us moving and just let the feeling of raw electricity and anticipation shoot through our bodies, shoot through our loins into each other.

Lisa's voice broke the silence but not the spell.

"How good?" Lisa enquired with a grin. "How good do you feel with your little sister straddling you like this in the middle of a lake?" My cock throbbed noticeably from the naughtiness of her words and from what she was inviting me to talk about: the elephant.

"Wow, Lisa," I began, relieved to release some of the pent-up emotion and tension. "You feel amazing like this...you look so... and feel... so damn good." I realized I was fumbling my words, but the sincere emotion in my voice was obvious. Lisa came to my rescue with a more specific question that even a guy with a raging hard on could answer.

"Do you like the feeling of my girly panties on your hard cock?" she asked, and as she did so I felt her hips move just a little forward to let the crotch of her panties - and the vulnerable pussy behind them - more firmly press against my shaft; so firmly I could feel her delicate pussy lips through the lace. Then, before I could answer, she pulled her hips back to their original position so that as before her panties were just barely touching me. Tease.

"God, yes," I confessed immediately, and gently squeezed the flesh of Lisa's round ass with my hands as if to exclaim my taboo desire for it. I wanted desperately to pull those narrow hips of hers back into mine again so her pussy would once more grind hard on my cock, but I dare not move.

"Good," she replied. "I wanted you to be the first boy to feel them; to enjoy them. I know how guys get all turned on by girly-girl panties, and these are for you," she informed me she continued her motionless but torturous tease. And as if to confirm her evaluation of the male weakness for panties, my cock began to throb and pulse even more noticeably at the ongoing gentle contact with her lace panties and the oh-so-tight teen pussy that lay just beneath them in such a tantalizing vulnerable way.

Clearly she could feel my need for her, but added more fuel to my fire by saying, "I think you like it when I talk about my panties, naughty boy." She obviously had no intention of stopping the teasing and the sharing. In fact, her next actions turned up the level of both.

Lisa's hips started to move ever so slightly up and down, which caused her panty-covered pussy to teasingly slide along the outside of my bare, hard, aching shaft. As she did so, she closed her eyes for a moment and for the first time and allowed her face to reveal her feeling of pleasure. God she was beautiful.

The moment of her hips was so subtle that anyone looking from the beach wouldn't be able to detect it beneath the surface. However, the tantalizing slow sliding of her panty-covered pussy along the outside of my shaft was having a powerful effect on big brother. And this was not just from how delicious her panties and body felt on my sensitive skin, but also from the fact it was Lisa, my 'little sister,' who was delicately rubbing against my cock like a sexy kitten in need of touch.

"Jesus, Lisa," I pretty much moaned as her thinly veiled pussy slowly and ever so delicately continued to slid up and down against me, as her big tits mounted on a little girl body hovered right before my face, as her hard nipples poked through her sheer bra as if daring me to suck them. "What are you doing to me?" I asked with no expectation of answer.

She ignored my question as her hips kept working their subtle but devastating magic.

And as the sharing and teasing continued she read my mind once again, "And what were you saying about my nipples before?"

I looked away from her eyes and without guilt directly at here tits, which were so delicious presented to me by the sheer lace bra. A bra, I know new, selected by Lisa for its ability to display her tits to me. To share them with me. My eyes focused on her hard nipples that poked out proudly to tease me with their size, their hardness, their prominence.

"I was saying, your nipples are so sexy....they need to be sucked. They need to be sucked hard, Lisa," I confessed in a husky voice.

"Yes, you were saying that, naughty boy," she teased with her words and her pussy down below. Then she confessed, "You know, Jack, I have never let anyone suck on them. But they are so sensitive when I've played with them. Even now, just the way you are looking at them is making me wet. Well that and you know..." she blushed in the most adorable way at the implied reference to the effect my hard cock was having on her pussy.

He words, her confession, and her gifts were already making my mind spin and she wasn't done exploring this new side of herself with me.

"Do you want to suck them Jack," she asked in a much lower voice, and I noticed she was now regularly closing and opening her eyes. She was clearly becoming more and more aroused by the sexual excitement that had been building with the teasing, with her confessions, with the pressure of my rock hard cock on her pussy, and most likely the unmasked lust I had in my eyes for her. And as if she was sensing an urgency insider herself, she didn't wait to hear my answer to her question before she began talking again.

As she looked directly in my eyes, she announced in a shy but determined tone, "There is something else I want to share with you Jack.... I want you to be the first man to give me an orgasm. Will you do that Jack? Will you make me cum?"

The way she ask that last question --will you make me cum?- with such an earnest and even desperate need in her voice told me shqe was already on her way. And, my god, I thought, how could she sound so vulnerable and helpless while simultaneous being in such control of me at this very moment? Was it her own state of arousal that was taking her over? Was my little sister a slave to the needs of her innocent but hungry pussy right now? If so, I found this to be...just incredibly sexy.

"Yes" was the only possible answer at that heated moment, and it flew right out of my mouth before my brain had a chance to even be shocked by Lisa's sudden boldness. And in a surge of lust I pulled her ass cheeks toward my hips forcing her teen pussy to grind on my cock. This also caused a bit of stir in the water.

"Slow, slow," Lisa scolded me gently as she looked around to see who might be looking. I lightened my grip on her lovely ass and let her resume control. She looked back to me once satisfied nobody was paying us any attention. Even her previous two beach admirers were oblivious as they threw a Frisbee around.

"A naughty tiger and a naughty boy," she said teasingly and in a far-away type of voice like she was here with me but also somewhere else. "Or should I say 'naughty horse?" she asked with a very slight moan at the end. I wasn't sure if this was a reference to her straddling of me or the size of the cock she was rubbing herself against. I didn't care, just as long as she continued to squeeze her legs around me tightly and rub those panties up and down, and let me feast on how beautiful she looked and felt.

And I knew her "slow, slow" command was bang on. There was something about having to be discreet and restrained in this in a public area that made the contact and the friction of our bodies even more delicious and even more of a tease. That and that fact that this little girl -my little sister- had just asked me to make her cum right in the middle of this park.