"Mmm… With my husband away, his little brother comes to play with me… You two are really… ahhh…"

After my brother finished and left the room, my sister-in-law lay on the bed, fast asleep and completely defenseless.

I could not hold back anymore. I reached out and touched her.

To my surprise, she woke up from my touch… yet instead of pushing me away, she pulled me into her arms, willingly letting me leave my marks all over her soft body.

Lost in the heat of the moment, I looked up–and saw my brother’s figure standing right there.

My name was Samuel Cramer, and I was a university student.

Summer vacation began a few days prior. I had nothing to do at home, so I went to Silverton to hang out with my older brother, Jack Cramer.

The moment I stepped into his house, I saw my sister-in-law, Erin Turner, come out of the bedroom wearing a thin spaghetti-strap nightdress.

"Sam, you're here! Come give me a hug…"

A sweet, fragrant scent instantly filled my nose as she pulled me into her arms.

I could clearly feel she was not wearing a bra. Her ample bosoms were separated from my chest by only two thin layers of fabric.

The soft pressure made my whole body tingle. Without thinking, I straightened my back and rubbed against her a little.

When she finally let go, she did not scold me for being rude. Instead, she winked at me, as if laughing that I had grown up and already knew how to take advantage of girls.

Her pretty face was flushed pink, looking especially beautiful.

Erin and Jack had been dating since high school, so she had always been very close to me. Back in our hometown, she would even bring me along on their dates.

Whenever she met her girlfriends, she would proudly introduce me to them.

"Look, I have a handsome little brother now."

I thought she really treated me like her own younger brother.

However, the problem was that I had become completely obsessed with her. Even when I was alone playing with myself, I fantasized about her.

What was worse was that I did not feel the slightest bit guilty about it. In fact, it only made me more excited.

Our relationship finally crossed the line on that sweltering evening after I secretly watched Erin and Jack being intimate.

That day, the air conditioner in the guest room had broken down. I was feeling hot and dizzy, so I got up to get some water.

The moment I stepped into the living room, a very faint, soft moan drifted out from the master bedroom and exploded in my ears, instantly waking me up.

"Gentle… Be gentler… It's too deep…"

They had not closed the door properly. From the side-rear angle of the bed, I could see everything clearly, but not Jack's face. Only their two naked bodies.

Erin was lying flat on her back, her two long, pale legs raised high and resting on Jack's shoulders.

That was the first time I had ever seen the most private part of her body.

I licked my lips unconsciously, watching as she gripped the bedsheets tightly, moaning delicately while her toes curled and trembled in the air, enduring her husband's rough thrusts.

"Does it feel good?"

Jack's low, muffled voice came from inside the room.

"Mmm…"

Erin let out soft, delicate, seductive sounds like a little animal. With every thrust from Jack, she let out a sweet little hum.

I felt both thrilled and bitterly jealous at the same time.

What thrilled me was seeing my gentle, beautiful sister-in-law with her legs spread wide open, revealing her most vulnerable and enchanting side to me.

What made me jealous was that if the man on top of her was me, I would probably die from how good it felt.

Her feet were still trembling in the air as her hips were lifted even higher, her whole body almost folded in half.

"This big butt… So alluring."

Jack started moving with greater force. His broad back and muscular hips pumped relentlessly, like a powerful bull that never tired.

Erin's toes, pointed straight in the air, suddenly tensed as she let out heavy, panting breaths.

"Sam… Sam…"

My heart jolted. I thought she had spotted me and quickly pulled my head back. But then I heard Jack chuckling darkly, "You like your little brother-in-law that much? Want him to sleep with you?"

Her soft, uncontrollable moans kept spilling from her lips. It was impossible to tell whether she was lost in pleasure or suffering.

"Ah… You go ahead and be with those other women outside… Why can't I let Sam have a little fun with me?"

"Right now… Is it me making you feel this good, or would your little brother-in-law make you feel better?"

The bed shook violently again. A draft from the hallway gently pushed the master bedroom door open a little wider.

Erin's stunning, seductive face suddenly appeared fully in my view.

Our eyes met in a way I had never imagined.

My heart pounded wildly. An extremely surreal feeling spread through my body like electricity. Although the weather was hot and humid, waves of cold air seemed to pour into me through every open pore.

Her gaze was strangely unfocused, with a dazed, vacant look I had never seen before. She was looking at me, yet it felt like she was staring straight through my body.

Her mouth hung open in shock, unable to make a sound, her lips trembling uncontrollably.

Then, the man on top of her suddenly thrust harder and faster.

The focus in her pupils scattered again in surrender. Her eyes rolled back uncontrollably, showing the whites.

An expression mixing intense pleasure, longing, and struggle appeared all at once on that beautiful, familiar face.

My heart was pounding in panic. I could not watch any longer.

Dizzy and light-headed, I stumbled back to my room, yanked off my underwear and tossed it far away, then fell into a heavy, dazed sleep.

I did not know how long I had slept before I was startled awake by a sound outside the door. It was Jack.

"I'm heading out to take care of something. I'll be back in an hour."

Then, the front door slammed shut and locked.

Was he talking to me?

My throat was dry from sleeping. Only then did I remember that I had been so busy peeking earlier that I forgot to drink any water.

I put my underwear back on and went to the living room to pour myself a glass of ice water. My mind finally cleared up.

My attention quickly shifted to my lower body, which was already rock-hard and throbbing with pent-up desire. It was so sensitive that just one stroke from my fingers would make it jump.

I peeked toward the master bedroom and called out softly, "Erin…"

There was no response. Erin was lying on the bed asleep, her beautiful hair spread out like a cascade of velvet.

Her pretty face was still flushed with lingering desire. The thin blanket only covered her stomach, leaving one of her pale, ample bosoms exposed. Her long, slender legs were pressed together again, regaining a woman's modest appearance.

I swallowed hard, my mind filling with wild fantasies.

Although Jack and Erin had always been especially good to me since I was young, they would not be that good… Right?

My whole body trembled with excitement. Gathering my courage, I climbed onto the bed and gently placed my hand on her chest.

"Mmm…"

Erin let out a soft moan.

I leaned over her, bringing my face close but not daring to kiss her. While fondling her bosoms, I kept whispering sweetly beside her ear, "Erin… Erin…"

She drowsily opened her eyes and breathed lightly, "Sam, is that you? Where's your brother?"

Seeing that she did not react with shock or anger, and instead first asked about Jack, my heart surged with wild joy.

Erin liked me.

"Jack went out. He won't be back for an hour."

I reported it like an obedient child, just hoping she would feel at ease and be intimate with me. In my heart, I kept chanting, 'Jack, Erin, you two are too good to me!'

"Bad boy… Your brother isn't home, so you come to play with your sister-in-law… is that it?"

Her soft hand gently stroked my face.

I did not answer. Instead, I pressed my body down onto hers and lowered my head to take her nipple into my mouth.

Erin seemed to treat me like a baby. She wrapped her arms around my head and pushed her chest up to make it easier for me. "Be gentle… Have you ever been with a woman before?"

"I… I've done it with a few female classmates," I mumbled.

"Were they pretty?"

"None of them are as beautiful as you, Erin," I cooed sweetly to please her.

She seemed very satisfied with my answer. Gently pushing me away, she said, "Get up. Let me make you feel really good…"

I obediently lay down on the bed.

Erin knelt between my legs, revealing her fair, voluptuous body. In one smooth motion, she pulled my underwear down to my knees.

My impressively endowed lower body sprang free.

She gasped softly. The spring-like lust on her face grew so intense it looked like it could drip with honey.

Even her voice turned unbearably seductive. "How did you develop like this? It's even bigger than your brother's…"

I reached out and kneaded her bosom, feeling a little proud.

Our family's genes were indeed excellent. None of the men were shorter than 1.8 meters, and our male features were generally over 20 centimeters, even more impressive than the most well-endowed men in adult films.

Many of my uncles did not have much money, but they all married exceptionally beautiful wives because they had completely conquered them in bed.

"Sam, you're really amazing!"

Erin seemed unable to let go. She played with my cock, turning it over and over in her hands. "So handsome, so gentle, and so big… You should play with more women…"

While stroking my length, she arched her body and extended her tongue, entangling it with mine in a deep kiss.

Then she turned over, got on her knees, and raised her round, plump, snow-white ass toward me.

"Come on, let me see how capable you really are…"

However, just as I was about to mount her and thrust in, a familiar voice suddenly sounded from behind me.

"Why didn't you wait for me?"

I turned my head. Jack was leaning against the doorframe, watching Erin and me with an ambiguous smile.