My name is Alex, and I am twenty-six years old. I have known my friend, Chris, for over a decade; we practically grew up together. Chris has an older sister, four years our senior, whom I have always affectionately called Big Sister.

Big Sister has been married for three years, and her husband is quite close to me as well. We often used to hang out and carouse together; in fact, it was her husband who first took me to experience the charms of a professional massage parlor. Despite having a young child, her husband never quite lost his playboy nature. To be honest, I was always envious of him for having a wife like her. Though she could seem quite stern at times, her figure and her scent were absolutely top-tier. Since my middle school days, she had been the constant object of my sexual fantasies. Sometimes, when visiting their home, seeing her freshly discarded lingerie in the bathroom would drive me into a frenzy, prompting me to secretly inhale the scent of her intimate garments.

I remember one particular occasion when one of the husband's friends was celebrating a birthday. The whole group went to a KTV to celebrate, but because of work, I arrived a bit late. By the time I showed up, the party was nearly over. The husband and his group of boisterous friends were in high spirits and were preparing to move to a second location. Consequently, the task of escorting everyone home fell to me. Big Sister, feeling a bit lightheaded from the drinks, had fallen asleep in the passenger seat of my car. After dropping everyone else off, it was just the two of us left. She was wearing a grey trench coat over a black, low-cut dress with a daringly high slit. Her curvaceous silhouette was enough to make my imagination run wild. With a great deal of effort, I finally managed to help her into her bedroom. She lay on the bed, lost in a deep, drunken slumber. Bored and restless, I pulled open her wardrobe. "Wow..." The closet was filled with her clothes, every single piece exquisitely beautiful. I couldn't help but think how wonderful it would be to see her wearing them, only to peel them off her body one by one.

As she lay there, her skin appeared snow-white and delicate. Her figure was breathtakingly voluptuous; beneath that high-slit black dress, her ample breasts were partially revealed, the fullness of her bosom pressing together to create a deep, enticing cleavage. Her breasts, which I had only ever kissed in my dreams, seemed to swell with life. Below her slender waist, her long, shapely legs—clad in elegant black stockings—peeked through the slit of her dress, the very tops of her thighs visible. She wore a pair of beautiful high heels, and her smooth, rounded arms exuded the mature, radiant charm of a woman in her prime. She was hundreds of times more beautiful than anything I had ever imagined. I stood there, completely entranced.

At that moment, logic escaped me. Using my burning lips, I began to kiss her flushed face and her fragrant neck, sending ripples of sensation through her. Then, I moved to her mouth, which breathed the scent of orchids, and began to drink in her sweet tongue, my hands roaming over her full, rounded curves. She responded instinctively, clinging to me and twisting her body to grind against mine.

With one hand tightly cradling the nape of her neck, I continued to kiss her luscious lips, while my other hand reached under the soft silk of her dress to knead her heavy breasts. Her breasts were incredibly large and possessed a divine elasticity; before long, her nipples hardened under my touch. I teased them gently with two fingers.

"A... Alex... don't... don't do this," she gasped, her breath shallow. "I'm... I'm your Big Sister... we shouldn't..."

But consumed by a raging fire of lust, how could I care? Even as she spoke those words, her hands were still clutching me tightly—it was clearly nothing more than a polite lie. How could I let such a moment pass? Ignoring her protests, I continued to press my lips against her rosy, lipstick-scented mouth, silencing her with deep kisses. My other hand slid up the length of her skirt, feeling the texture of her stockings as it moved up her thigh. She trembled slightly, reaching down to try and catch my hand to stop the exploration.

"Big Sister, Alex will really treat you well from now on. I'm not lying!" I whispered softly. At the same time, I pulled out my thick, long, and rock-hard cock and guided her hand onto it.

When her palm first made contact with my member, she recoiled in a panic, but she couldn't help herself; her hand instinctively curled around it. It was so engorged with blood that she could barely wrap her fingers around the entire circumference. Her touch was so incredibly tender that the sensation sent an indescribable wave of pleasure through me. I wondered what it would feel like to slide deep inside her—would I erupt too soon and disappoint her?

"Big Sister, do you like it?" I teased further.

Blushing deeply, she lowered her head in silence. I pulled her petite, delicate body back into my embrace, continuing to massage her heavy breasts while her hand remained firmly clamped around my cock.

"Alex... let's... let's not go any further... let's just... stay like this, okay?"

"Like what?" I asked, feigning innocence.

"Just like this! You're teasing me so much," she said with a coquettish pout, sounding almost mock-annoyed.

"Don't be angry. I really don't know what you mean. Why don't you tell me?" I seized the opportunity to press her again.

Of course, this was her first time betraying her husband with another man—her younger brother's best friend—and she was clearly nervous. "Alex... just... just like this... hold me... kiss me... touch me!" She hid her face in my chest, shyly accepting my heated kisses while her hand began to rhythmically stroke my cock. Meanwhile, one of my hands continued to tease her breasts while the other slipped beneath her silk panties to caress her mound.

"Ah... ah...!" As my fingers worked her most sensitive spot, a wave of numbness and heat washed over her. Her core grew hot and slick, and she began to leak a heavy flow of arousal that soaked through her panties. Her body writhed beneath me, and soft, rhythmic moans escaped her lips: "Mmm... mmm..." I pressed two fingers together and slid them deep into her soaking wet entrance.

"Ah... oh..." Her interior was incredibly soft. My fingers moved rhythmically, probing deep toward her womb.

"Oh... ah..." Her face flushed a deep crimson as she instinctively struggled, squeezing her long, beautiful legs together to try and contain my intrusion. She grabbed my hand with hers, so I guided her hand to join mine, using both to swirl around her clitoris. "Mmm... mmm... oh... oh..." The soft sounds escaping her mouth betrayed the passion she was trying so hard to hide. But as my dual assault of pleasure continued, her entire body began to tremble. The repeated teasing stoked her primal fires until her eyes were glazed with pure lust, her expression shouting that her desire had reached its absolute peak.

I climbed on top of her, laying my torso over hers so we were in a 69 position. My thick rod found its way into her small, cherry-like mouth, while simultaneously, my tongue worked feverishly upon her clitoris and labia. She bucked her hips wildly in response, her juices flowing in a steady stream which I greedily swallowed. She was not to be outdone; she began to suckle on me with fervor, her small mouth wrapped tightly around the length of my cock as she used her hands to stroke the shaft and massage my balls with frantic intensity.

The sensation of her mouth was heavenly, especially when the tip of her tongue swirled around the head of my cock. I responded by lashing my tongue against her clitoris and labia, sucking deeply on her folds. Finally, she spat me out, her voice thick and breathless. "Ah... I can't take it anymore! Just fuck me!"

Deciding to tease her a little more, inspired by the erotic videos of "tit-fucking" I had seen, I flipped over and knelt above her chest. I placed my thick, heavy cock between her lush, full breasts, using my hands to squeeze them together until they enveloped the shaft, and began to slide in and out of the cleavage. Big Sister knew that this rogue wouldn't move to her core until she was absolutely desperate, so she intelligently opened her mouth to suck the head of my cock every time it popped out from between her breasts.

"Mmm... it's amazing... Big Sister... this feels almost as good as your pussy... your breasts are so soft and slippery... it feels even better than sucking... ah... wonderful..." I groaned, picking up the pace. She spat the head of my cock out and cried, "Little brother! My pussy is so itchy... use these breasts for me too... but please... the pussy... I really need it!"

Seeing her looking so desperate, my heart ached for her. "Alright, alright! I'm coming!" I climbed off the bed, pulled her legs around my waist, and rubbed the head of my cock against her wet entrance a few times before sinking down with a heavy thrust. *Squelch!* She gasped as the egg-sized head of my cock hit her cervix, filling her completely. "It's so thick and long... it's filling me up so much..." she breathed, her legs locking tightly around my waist as if afraid I might escape. The rhythmic *squelch, squelch* of our union filled the room as she began to moan lustily.

"Ah... mmm... my womb... it's being hit so hard... oh... it's so numb... it's itchy and tingly... ah... don't go too hard... it almost hurts... oh... oh..."

As the passion intensified, she wrapped her arms around my neck. I gripped her buttocks with both hands and lifted her up. "Big Sister... let's change positions. It's called 'riding the donkey.' Hold onto my neck and wrap your legs around my waist—don't fall!" Carrying her in my arms, I began to pace around the room. As I walked, her body bounced up and down, her pussy gripping and sliding along my shaft with every step.

Because her feet were off the ground, her walls squeezed me tightly, and the head of my cock kept rubbing directly against her most sensitive spot. The friction was overwhelming. "Mmm... it's so intense... my center is being... rubbed raw... it feels too good... you little devil... slow down... let me down... I have no strength left... oh..."

After only a few dozen steps, seeing her exhaustion, I sat on the edge of the bed, using my hands to bounce her hips up and down. She unhooked her legs from my waist, wrapped her arms around my neck, and began to use her own strength to thrust her hips against me, taking the lead. She pressed her hands against my chest, pushing me down onto the bed, and then began to grind her hips in a circular, windmill motion. It was a sensation unlike any other; the friction against the head of my cock was so intense it felt like a numbing, electric pleasure. I couldn't help but cry out, "Ah! Oh! This is incredible! Your pussy is amazing!" After we had been at it for quite some time, under the relentless assault of her "windmill" technique, we both finally crested the peak of sexual ecstasy together.

From that moment on, our sexual relationship turned us into something akin to a devoted, secret couple. I became the center of her world. We took advantage of every moment the husband was away, exploring every corner of the house, and even once, when the neighbors were out, we made love in the stairwell. That passionate affair lasted until the day I finally got married and moved away to Taichung.