Finally, night fell. After countless patient persuasions in bed, my girlfriend finally agreed to let her younger sister watch us make love. Just as we had planned, my girlfriend had convinced her sister first. The girl was only sixteen, spending her days hanging out with a crowd of little delinquents, but she was undoubtedly still a virgin. Driven by intense curiosity, she eventually hesitated but agreed, submissively making her way into my girlfriend's bedroom. Since her parents were away visiting relatives, it was the perfect opportunity to finally implement my plan.

My girlfriend's bedroom contained two single beds. I had her strip naked and lie on her own bed while her sister sat on the other, watching. I stripped as well, gazing at the naked woman before me. My girlfriend was twenty, possessing a doll-like face, standing only 1.57 meters tall, and quite slender. Her two small breasts were about the size of eggs, adorned with two nipples that had turned a slightly darker shade from my frequent sucking. Below her flat little belly lay her small vulva, with hair distributed moderately across her mound, and her outer lips slightly flared from the countless times I had penetrated her.

Looking at this girl whom I had fucked several times a day, I skillfully gripped her breasts with both hands. Because they were small, they fit perfectly within my palms. I squeezed them with all my might, occasionally pinching her tender nipples with my fingers, listening to her moans of mingled pain and extreme pleasure. Though her body was petite, her libido was incredibly strong; my rough movements satisfied her completely. After kneading them for a while, I began to take her right breast into my mouth in large gulps, nearly swallowing the whole thing, while my left hand continued to massage her other breast and her hardening nipple.

My mouth wrapped tightly around her breast, and then my teeth suddenly clamped down on the nipple. It wasn't a gentle nip, but a forceful bite; once clamped, I pulled upward, watching her breast stretch long. Her moans suddenly spiked in volume, letting out sharp "Ah!" cries with every tug.

I could tell she was in some pain, but it was accompanied by an intense sense of ecstasy. After biting her for a while, I began to lick downward—her belly, her mound, her hair, all the way to her labia. I parted her outer lips and buried my nose and mouth there, licking her vulva vigorously. I sucked her inner lips into my mouth, alternating my nose and tongue as they explored her vagina.

Her legs were raised high, wrapping around my neck as she trembled in waves. I lifted my head to look at her sister sitting nearby; she was watching us intently, her face flushed as if she were watching an adult film for the first time. *Alright, the foreplay is almost done. Now, let me show you real sex. Let's give you a proper education,* I thought. I rose and sat atop her breasts, feeling the heavy, ragged gasps coming from beneath me.

"Do you want it?" I asked teasingly.

"I want it..." she gasped.

I thrust my already erect cock into her mouth. She was submissive and skilled, wrapping and licking it back and forth. After letting her go for half a minute, I pulled out and grabbed her legs, spreading them as wide as possible. I pressed the head of my cock against her juice-slicked vaginal opening, grinding my glans rhythmically against her clitoris.

"Do you want me to fuck you?"

"Yes!"

"Where do you want me to fuck you?"

"..."

"Say it!"

"My pussy! Fuck my little pussy!"

I chuckled. "You've been letting me fuck it for so long, and it's still 'little'?" My girlfriend glanced at her sister, her face reddening. As the glans rubbed against her labia and clitoris, her hips and legs writhed incessantly; she clearly couldn't take it anymore.

"Please, just fuck me!" she cried out in a daze, no longer caring that her younger sister was watching. I was reaching my limit too. With a powerful thrust of my hips, my cock slid into her fluid-drenched vagina with a wet *thwack!* Every thrust was delivered with full force, making her small body shudder backward.

"Emily! Emily! Ah! Ah... don't stop! Fuck me harder! Fuck my tender little pussy! Harder!" I gripped her small breasts, squeezing them hard with every thrust. As we fucked, I leaned down to bite her nipples tightly. As her body was driven backward by the force of my thrusts, her nipples were caught in my teeth, being tugged and pulled. After only a hundred strokes, she had lost all sense of everything, doing nothing but moaning lustfully, "Fuck me! Fuck me!" Because her body was small and her vagina wasn't very deep, I began to thrust even deeper, sending waves of tremors through her body.

"Ah! You hit the bottom!" After about three hundred thrusts, I pulled out and changed positions. I had her prop herself up on her hands on the bed, her small buttocks facing me, her face aimed directly toward her sister. I lunged in from behind, hammering into her stroke after stroke.

"Lift your head," I commanded.

She lifted her head, her eyes meeting her sister's gaze perfectly.

"Does it feel good? Do you want more?"

"Yes! I want more! More! It feels so good!"

"Say, 'fuck my little slutty pussy!'"

"Ah... fuck, fuck my little slutty pussy!"

"Say, 'fuck me to death!'"

"Fuck me to death! Just fuck me to death!" To maximize the effect, I kept making her say these lewd words, determined to make her sister fully accept the depravity. She looked at her sister while moaning these slutty things.

Suddenly, I stopped thrusting and lay back on the bed, letting her sit on top of me. My cock plunged once more into her torrential flow. Gripping her small breasts, I began to hammer into her again. She suddenly leaned forward, sitting on me and biting my nipple. As I thrust, her body bounced up and down, her ponytail swinging wildly, yet she wouldn't let go of my nipple, her body rising and falling as she lunged back toward my mouth. The stimulation was so intense that I felt as though I were about to ejaculate.

I pulled out, stood up, and rubbed the head of my cock twice against her face. A burst of white semen sprayed across her face, staining her glasses as well. Just as the second wave was coming, I pulled back and aimed at her labia, continuing until the very last drop of semen landed on her inner lips. Finally, I collapsed back onto the bed. I turned to look at her sister, Dee, who had been watching the whole time. Although Dee was only sixteen, she was much taller than her sister and had a more balanced, curvaceous figure rather than being as thin. Her breasts were quite full, appearing slightly larger than her sister's. After all that preparation, my plan could finally begin.

I stood before Dee, holding my softening cock near her mouth with one hand while cupping her chin with the other. "Take it in. Feel it," I told her. Having watched for so long, she should already be feeling something. Sure enough, after a moment of hesitation, Dee opened her mouth and took my member inside. An indescribable warmth and pleasure surged from my cock. Though she lacked her sister's technique, having a girl who had never given a blowjob before suckling me was a wondrous sensation.

Before long, my cock grew hard again, stiffening in Dee's mouth. After thrusting in her mouth for a while, I pushed her back onto the bed. Pressing down on her, I lifted her T-shirt and white bra, causing a pair of firm, perky breasts to spring out. "What are you doing?" her sister asked in shock from the side. Dee also hurriedly tried to cover her exposed breasts with her hands. I grabbed her hands and pulled them apart, saying slowly, "I just want to see how your sister's body differs from yours. Since she's already seen us fucking and seen how slutty you are, she's probably a little slut herself." As soon as the words left my mouth, I leaned down and took her upturned, pink nipple into my mouth. I sucked and bit at her two soft breasts, my hands constantly pulling at her protruding nipples.

Dee began to whimper. Once her nipples were hard, I slid lower, grabbing the waistband of her pants. Along with her lacy panties, her trousers were pulled down. Dee reached down to cover her private parts, but I stripped the rest of her pants away and pried her hands apart, revealing her most exciting part. Dee’s crotch seemed almost underdeveloped; her snowy abdomen was smooth, save for a few short, fine hairs. Between her legs was a narrow slit, with her pink labia only protruding slightly.

Following the seam, I parted her labia to reveal the pink inner lips and a clitoris the size of a grain of rice. I hadn't expected a young girl to be so enticing. Unable to help myself, I buried my head there, licking deeply against her clitoris.

"Ah! No!" Dee's lower body trembled as she reached out to push my head away. I brushed her hands aside and gripped her firm breasts, pinching her pink nipples between my thumb and forefinger.

"Ah... gently! Gentl..." Dee's body shook in waves as she moaned softly, and moisture began to flow from her core. Seeing her in such a state of ecstasy, a fire burned in my chest; I was losing control. I sat up, aiming my glans at Dee's entrance. I used a bit of her moisture to lubricate the way and tried to push in, but it wouldn't go.

A virgin was indeed tight. My glans rubbed unyieldingly against the tender flesh of her inner lips as I used my hand to guide my cock into position.

By now, Dee realized something was wrong; her body was thrashing wildly, and her sister crawled over, trying to pull me away. I turned to my girlfriend and said, "When we first fucked, you said you were a virgin, but you went in easily without much pain. Your sister's reaction is very different. If I can't get in, you must have been lying to me!" With that, I pressed one hand against Dee's soft chest to keep her still, while the other guided my cock, thrusting upward. Suddenly, the head entered a little; half the glans was tightly gripped by the tender walls. That was it! With a surge of my hips, my cock plunged one-third of the way in, the glans completely engulfed.

Dee let out a loud "Ah!" her face contorting in what seemed like pain. I tried to push deeper, but found it impossible to move forward; her unspent pussy was so tight it actually felt painful for me. I paused, took a deep breath, and suddenly threw my entire weight downward. With the weight of my body, my cock went in with a wet *thud!*

"It hurts!..." Dee shrieked, tears instantly streaming down her face. Although I was all the way in, her untouched vagina gripped my cock even tighter. I began to move slowly in and out. Dee's hands gripped my arms tightly, letting out "Ah... ah..." sounds with every stroke. After a while, feeling her lubrication increase, I grabbed her hips and began to thrust with massive, full-force strokes, bottoming out every time. Dee's cries changed from slow whimpers to long, sharp screams of "Ah!" with every deep impact.

This was the first time I had ever felt a cock thrusting inside such a tight, tender little vagina. The soft walls sucked at me, sending waves of numbing pleasure through my entire body.

Completely lost in the sensation, I became intoxicated. Using her perky breasts for leverage, I hammered into her, my cock charging against the incredibly tight walls. My grip left red marks on Dee's breasts, and I frequently leaned down to bite and tug at her nipples.

"Ah... Brother! Ah..." The excessive stimulation caused Dee to moan lustfully. Her pink inner and outer lips were pushed into her vagina and then tumbled back out with every heavy thrust. I accelerated my pace, getting faster and faster, bottoming out with every stroke until Dee's entire body was rocking violently. It was coming; all the sensation was concentrated at the tip of my cock. I pulled back, aimed at her labia, and with a final twitch of my glans, ejaculated all over the central seam. The thick semen slid down the slit, past her anus, and dripped onto the bed.