Chapter 36: Fucking My Sister Behind Mom's Back
Chapter 36: Fucking My Sister Behind Mom's Back
I patiently held out for another thirty seconds, but Mom’s voice calling my name grew louder, and her knocking became increasingly urgent.
I stopped my thrusting movements. My sister looked as if the world were coming to an end.
"No choice, I guess I have to answer," I said helplessly. "If I don't, Mom will definitely think there's some kind of emergency."
"Okay..." My sister was so panicked she had completely lost her head.
I put on a voice that sounded like I had just woken up. "Mom? What’s wrong? I just laid down."
The knocking stopped instantly. There was a brief silence outside the door before Mom spoke slowly. "Why did it take you so long to say something?"
"I just fell asleep and didn't hear you. Is something the matter?"
Another long silence followed from outside. My sister and I held each other tightly. Looking at her lovely, flushed face—full of the lingering traces of spring—my heart was a mess of nerves. An indescribable thrill surged through me, making my entire body tremble with excitement.
Mom was standing right outside, separated from us by only a single door. Yet here in the bedroom, I had my cock thrust deep between my own sister’s thighs, my thick rod pressed tight against her pussy as I committed this act of incest.
The thrill of the illicit affair and the sense of moral transgression made me unable to stop myself from thrusting my hips again, continuing to slide in and out of my sister’s thigh-gap.
My sister stared at me in shock, her beautiful little face filled with disbelief. She seemingly couldn't believe that I would dare to do something so bold in such a tense atmosphere.
"What are you doing..."
She pushed gently against my chest to stop me, her voice soft and hushed. "Mom is right outside."
"It’s fine."
I pinned her down as she tried to escape. "Mom can't get in. Don't move, or she might hear something."
"No..." she whispered, struggling weakly, her cheeks full of worry that we would be discovered.
Slap!
I gave her beautiful ass a light swat. The crisp sound was incredibly piercing in the silence of the night.
I lowered my voice. "If you don't want Mom to hear, then be a good girl and listen to me."
Sure enough, my sister didn't dare move recklessly again. She only bit my lip hard to express her protest.
Mom’s cold voice drifted in from outside again. She sounded hesitant, perhaps feeling embarrassed for disturbing me so late. "Mom... Mom doesn't really have anything important."
I signaled for my sister to lie face down on the bed. She was reluctant, offering a bit of resistance.
I continued to go back and forth with my sister while answering Mom. "Oh. Well, if it's nothing, then that's fine."
Half-willingly and half-forced, my sister knelt on the bed. I pinched her slender waist, signaling for her to stick her little bottom up.
She propped herself up with her arms, her body stiff. Her back was as rigid as if it had been nailed in place; she was unwilling to strike such a shameful pose.
I grew slightly impatient and lightly patted her rounded butt cheeks. I pressed my fingertip against her pussy through the layer of her soaked panties, the gesture carrying a hint of a threat.
Feeling the threat to her private parts, her tender, perky ass couldn't help but tremble. She pouted slightly and slowly assumed the kneeling position with her rear raised. As her slender waist dipped and her beautiful ass tilted upward, her seductive body formed a curve that would haunt any man's dreams.
Looking at my sister on the bed, my breathing became incredibly heavy, and the cock between my legs throbbed with a painful hardness.
Her long black hair was scattered, hiding the expression on her face.
Her snow-white jade arms were bent, her slender hands gripping the sheets on either side of her head. Her soft waist was slightly arched, presenting her full, perky buttocks high toward me. Because of her posture, her nightdress had fallen toward her chest and neck, revealing her jade-like waist and perfect long legs.
From the chest down, she was completely naked, save for a single pair of thin, soaked panties.
Looking at my own sister, who was only sixteen but had a body that was far too good, my eyes turned blood-red. I immediately gripped her slender waist and thrust my hips. Accompanied by a soft moan from her, I buried my cock deep into her thigh-gap. When my waist slammed against her beautiful ass, the head of my dick poked out from the front of her legs, pressing against her lower belly.
Whether intentionally or not, my sister squeezed her legs together, and her butt cheeks tightened along with them. This made the crevice gripping my rod even tighter, making me hiss through my teeth from the sheer pleasure.
The sound of the doorknob turning rang out. Mom’s voice was cold and puzzled. "Why is the door locked today? Don't you usually leave it unlocked?"
"Oh, I must have just locked it out of habit. I didn't really notice."
Mom’s tone softened. "Then, is it convenient to open the door for Mom?"
Looking at my sister pinned beneath my hips in a doggy-style position, my heart felt like it was going to jump out of my throat. I gently pumped my rod, slowly sliding it between her butt cheeks, the thick shaft rubbing against her gorgeous, tender pussy over and over.
Open the door? If I had a death wish, maybe I would.
I tried my best to keep my voice normal. "Mom, if there's something, let's just talk about it tomorrow."
"Ac-actually, it's nothing much." Mom’s voice sounded even more hesitant. "I just wanted to check on Xixi, but her door is locked too. I thought I’d go through your room."
I squeezed my sister’s tight butt-flesh, causing a low moan to escape her small mouth. I could clearly feel her thigh-gap getting even wetter. "Then why don't you just knock on her door?"
"I was afraid of disturbing her sleep."
Hearing this, I knew Mom’s real intention wasn't that. This excuse was ninety-nine percent likely a way to check up on us.
I slammed my hips hard against my sister’s full buttocks to express my frustration. "Then you aren't afraid of disturbing my sleep?"
Beneath me, my sister’s body suddenly tensed, her legs and butt cheeks clamping even tighter. She was clearly having a hard time under my deliberate bullying.
"Fine, fine. You should get some rest too."
Mom didn't push further. It wasn't convenient for her to state her intentions directly, so after her investigation yielded nothing, she took the initiative to leave.
I didn't know if Mom had actually left or was just pretending, but I continued to slowly slide in and out of my sister’s thigh-gap, enjoying the long-lasting pleasure of our sibling genitals rubbing together.
With every thrust, a soft moan escaped my sister’s mouth—like the cry of a cat, like a celestial melody. It made the cock between my legs harder and harder. I began to thrust faster and faster until, finally, it was like a torrential storm pouring down. I thrust wildly, no longer caring if Mom might be eavesdropping outside. My slamming waist made a loud smack-smack sound against her beautiful ass, and her low gasps and moans were constant.
To prevent her cries from alerting Mom, my sister even had to bite down on her nightdress to keep from letting out a high-pitched scream.
The moon hung in the western sky and the stars shifted. I didn't know how much time had passed, only that my sister, who had reached orgasm countless times beneath me, had turned into a puddle of water from the non-stop thigh-fucking. She couldn't even keep her little ass up anymore; she had to rely on me holding her waist just to maintain the doggy-style position.
"Xixi... Sis, I'm going to cum!"
I grit my teeth, my rod still sliding rapidly back and forth in her muddy thigh-gap.
"Mmm, mmm..."
My sister didn't respond. Half of her face was pressed against the bed, her red lips slightly parted, a bit of saliva trailing from the corner of her mouth. Her eyes were unfocused, her expression dazed. She could only instinctively let out one low moan after another from her throat.
"Hngh!"
I let out a muffled groan and collapsed onto her, pinning her to the bed. My rod, buried deep in her butt-crack, gave a final few twitches as wave after wave of thick cum soaked the center of her thighs.
"Nnh..."
As the scalding heat washed over her private parts, my sister’s slender hands gripped the sheets tightly. Her beautiful, youthful body trembled uncontrollably.
Her rear twitched, and her two elastic butt cheeks contracted slightly, clamping down on my rod as if she were actively giving me a massage.
I hissed in pleasure. The rod pressed against her pussy felt a surging wetness as her sensitive, tender hole also sprayed out a large amount of pussy juice, using an orgasm to bring this intense session of thigh-sex to a perfect conclusion...
"So heavy... Brother, get up..."
After an unknown amount of rest, my sister, pinned beneath my entire weight, murmured weakly. Her voice was devoid of strength.
"Okay."
I was a bit lightheaded from the pleasure; I had almost fallen asleep right on top of her beautiful body.
Forcing myself to stay awake, I carried my sister—who was as soft as a spring puddle—to the bathroom.
The center of her thighs and her panties were covered in the cum I had shot, a complete mess. Her two jade-smooth, long legs were also covered in the streaks of flowing pussy juice.