Custom Audio Caught by My Straight Stepsister - Chapter 1

“Mm… Sister…”

The bathroom was bathed in a dim, amber glow, casting flickering shadows across the room. Ming Fei was pinned against the wall by her stepsister. Her lips were slightly parted as she breathed heavily, letting out a series of muffled, restrained moans.

On the left side of her sister’s collarbone sat a tiny black mole. It swayed enticingly before Ming Fei’s eyes, like a bird gliding through a dream. She stole a fleeting glance at it before snapping her head back up, her sister was biting her neck.

Their bodies were pressed as tightly as possible, nearly merging into one. Her sister held her in a vice-like grip, her palms grazing every inch of Ming Fei’s skin. As her physical longing screamed for more, Ming Fei threw her arms around her sister, her other hand pressing desperately against the wall that had grown warm from their shared heat.

Steam rose in swirls, blurring her sister’s face. Ming Fei reached out, seeking the lips that had just been entwined with hers, but as the mist thickened, she could only hear her sister’s low whisper.

“Xiao Fei, Sister likes Xiao Fei.”

Sister.

Xiao Fei loves Sister, too.

Sister.

Ming Fei’s eyes snapped open. The first thing she saw was the privacy curtain of her dorm bed. The dampness, the entanglement, the kisses… they had all vanished. Only the sticky sensation between her thighs served as proof of how immersed she had been in that dream.

Another wet dream. And once again, the star was her sister. If her sister ever found out how many times they had “slept together” in her dreams, she would probably be so terrified that she’d sever their sibling bond entirely.

Staring blankly at the curtain, Ming Fei replayed the dream in her head for a moment, feeling a mix of melancholy and satisfaction. She rolled over and grabbed her phone. It was 7:30 AM. She opened WeChat and switched to her burner account. She had sent her sister a message last night and wasn’t sure if there had been a reply yet.

Ming Fei grew tense, her heart racing so early in the morning. Last night, after sending the message from her alt account, she had immediately switched back to her main account. It was a way to avoid the immediate shock or rejection of a reply—a way to pretend she hadn’t sent such an outrageous and suggestive message. She had waited all night just to check the results this morning.

She refreshed for two seconds. No red notification dot.

[Me: Teacher, are you free to record this line for me? Use a “mature sister” voice, maybe a bit more dominant.]

[Script: Bad puppy, you’re going to get a spanking if you don’t listen]

The chat history remained frozen at the text and the bank transfer she had sent the previous night.

Ming Fei felt a wave of disappointment. Checking the time, she realized it was time to get up. Her charger hadn’t been plugged in properly, so her phone hadn’t charged at all. She plugged it back in and sat up, preparing to change.

Ming Fei was currently in the first semester of her senior year.

She attended a decent university, but the dorm conditions were completely beneath the school’s reputation. It was a six-person room with two sets of bunk beds and two loft beds over desks. The iron frames were likely older than she was; when she sat up, the bed let out a loud creak. Someone immediately tapped twice on her outer railing. Her bottom-bunk mate, Chen Yujie, whispered, “Feifei-chan, are you awake?”

Ming Fei pulled back the curtain. “Yeah, I’m getting up now.”

Chen Yujie switched off her small desk lamp and flicked on the main dorm light, no longer needing to whisper. “Can I borrow that lipstick you wore last time? I meant to buy it but forgot, and I just realized I should order it now. I’m going out today to meet my ‘wife’ from the game.”

Ming Fei hesitated. She knew exactly which lipstick Yujie was talking about. If it were something she had bought herself, she wouldn’t mind lending it to a roommate since they all got along well. But that berry-toned shade was a back-to-school gift from her sister.

She didn’t want anyone else using something her sister had given her.

“Um, I actually can’t remember where I put it. I have another one in a similar color, do you want to try that instead?”

Chen Yujie continued dabbing her face with a powder puff. “Sure, sure!”

The other roommates had already left. Being seniors, graduation was looming. Two were prepping for post-grad exams, one was planning to study abroad, and another was interning. Ming Fei was juggling job hunting with her graduation thesis, while also working three afternoons a week at the campus cafe and two days as a counselor’s assistant at the career center.

Feeling guilty for lying to her roommate, Ming Fei climbed down and proactively helped Yujie curl her hair. Touched, Yujie hugged her. “Wooo, Feifei-chan, why are you so good to me? Watashi loves you so much.”

Ming Fei laughed. “Don’t love me, you’re about to go meet your wife.”

“Loving you is my own business” Yujie said, before suddenly pivoting to gossip. “By the way, how are things going with that senior? The one from the research group?”

“Senior?” Ming Fei frowned. She and Yujie shared the same thesis advisor, who also mentored grad students, so they often attended group meetings together.

“There’s nothing going on there. He was being vague and flirtatious, and I made my stance very clear.”

A first-year grad student had indeed asked her out for dinner and tried to strike up conversations, hinting at his interest. She had rejected him bluntly to avoid wasting anyone’s time.

“Huh?” Yujie’s mouth hung open. “But I heard from another girl in our group that the senior said you two were practically official. He said you were just playing hard to get and stringing him along. I really thought you were into him.”

Ming Fei felt a surge of disgust. “Not interested, not even a little bit.”

“So he’s just living in a dream world then? It’s one thing to daydream, but to go around telling everyone… he looked so decent during the meetings, who knew he was such a narcissistic jerk? Gross! Definitely don’t talk to him. That kind of guy would take a ‘thank you’ as a sign that you’re in love with him. Anyway, we don’t have that many meetings left.” Yujie grumbled indignantly.

Ming Fei nodded. Honestly, she didn’t care much about what others said of her, as long as it didn’t cause serious trouble.

She only cared about how the person who mattered most to her saw her.

After a quick tidy-up, her phone was halfway charged. Ming Fei headed to the library to work on her thesis proposal. Passing the cafeteria, she grabbed some soy milk and a custard bun for breakfast.

On her burner WeChat account, the contact labeled “Sister” still hadn’t replied.

She switched back to her main account. Her sister, Fu Zhisu, had just messaged her two minutes ago.

[Sister: Xiao Fei, it’s getting cold. I bought you a scarf; it should arrive in a day or two, so remember to pick it up.]

Fu Zhisu was her stepsister, brought into the family by her stepfather. When the families first merged, Fu Zhisu was fourteen, and Ming Fei was only nine. At their first meeting, Ming Fei had been full of hostility toward her calm, indifferent older sister. Her stepfather was an adult, and children are naturally wary of adults; Ming Fei was no exception. She hadn’t dared to look the chain-smoking middle-aged man in the eye, so all her focus had landed on her stepsister.

She hadn’t known how to accept this girl who had intruded into her family. Subconsciously, she equated the “intruder” with a “destroyer,” pouring all her childish fear and resentment onto her sister.

It was only later that Ming Fei realized it was her mother who had moved into her sister’s house, physically speaking, she was the intruder.

Later still, her stepfather died in a drunk driving accident. Her younger brother was taken away by their grandmother, and her mother’s mental health declined. Her stepsister became the only person in the world who loved her.

In fact, it was possible that from the very beginning, her sister was the only one who had ever truly loved her.

Ming Fei couldn’t pinpoint exactly when her feelings for her sister had begun to change.

Not that it mattered; Fu Zhisu was straight, and they were still sisters in name. If she ever let a hint of her feelings slip, she probably wouldn’t even be able to remain a sister.

Ming Fei had long since grown accustomed to this secret pining.

[Ming Fei: Okay, Sister.]

[Sister: Find some time to update your glasses. When I was home last time, I noticed you were squinting at the TV. Your prescription might have gone up.]

[Sister: There should be an optical shop near campus. Don’t go too far.]

Ming Fei replied with a dutiful “Okay.”

She pushed up her glasses; things in the distance did seem a bit blurry.

Thinking her reply was a bit too robotic, she added: [I’m going to the library to work on my thesis today. Did you buy a scarf for yourself, too?]

[Sister: I did.]

[Sister: The same one as yours [Grin][Grin]]

Ming Fei couldn’t help but smile.

Matching… if she stretched the definition, they were practically “couple” items.

[Sister: I’m going to be busy now. Good luck with the thesis [Victory][Victory][Victory]]

Ming Fei sent a cute puppy emoji in response. Then, her fingers froze on the screen and her heart squeezed, her sister messaging her meant she was reading her WeChat. That meant the message she’d sent from her burner account had definitely been seen by now.

Had her sister replied? Or had she rejected the request?

Would she be able to fall asleep tonight listening to a new recording from her sister?

Her sister probably hadn’t guessed that the alt account belonged to her.

Taking a deep breath, like someone checking their college entrance exam results, she switched accounts once more.

Still no reply.

Ming Fei grew anxious again. On this account, she was paying Fu Zhisu to record audio according to her scripts. As a client, she usually received quick replies. Since she had started using this account to message Fu Zhisu two months ago, her sister had never taken more than two hours to respond.

It seemed this time the script was too much.

Fu Zhisu was a relatively traditional person. Expecting her to call a “stranger” over the internet a “puppy” or talk about “spanking” was likely too difficult for her to say, even for money.

Ming Fei worried that this inappropriate request might make Fu Zhisu stop taking her commissions altogether.

This was the only way she could ever hear Fu Zhisu call her “wife.”

She didn’t want to lose that.

Struggling, she typed out: [Teacher, if it’s inconvenient, it’s totally fine. Can we change the script to something else?]

After finishing breakfast and entering the library, it took a while for Ming Fei to settle her nerves and focus on her thesis.

Writing a thesis made time feel both short and long. It was agonizing, making every word feel like it was moving at half speed, yet it was so fast that a day could slip away after only writing two paragraphs.

When she returned to the dorm, her roommates were all back. One roommate from the local area had a mother who sent over some fried pork ribs. That roommate also gave Ming Fei a tube of hand cream her mother had brought back from an overseas trip, a thank-you for the beautiful manicure Ming Fei had given her for free.

The roommates were close and always courteous with each other. Ming Fei tucked the cream into her bag, planning to give it to Fu Zhisu the next time they met. The winters in her sister’s city were particularly dry. Fu Zhisu always reminded Ming Fei to use hand cream but often forgot to use it herself.

Another roommate, Ruan Ying, came over to ask about the formatting for the thesis proposal. Ming Fei was explaining the details of the templates and fonts when her phone vibrated on the desk.

Ming Fei caught a glimpse of the notification and her breath hitched. Before she could look away, she snatched the phone up.

Ruan Ying said, “Fei-Fei, are you busy? I think I know how to write it now. You go ahead, thanks, mwah.”

Ming Fei was already miles away. “It’s my sister.”

Fu Zhisu had reached out, but not on her public WeChat. It was on the burner account where Fu Zhisu was the only friend, a secret known to no one else.

She flew to the balcony to wash up, and in less than five minutes, Ming Fei scrambled up to her bunk, pulled the curtain shut, and dove under the covers. Chen Yujie laughed, “Feifei-chan, did you install some kind of quest system? If you don’t lay down within the time limit, do you get electrocuted?”

Ruan Ying chimed in, “Yujie, it’s her sister.”

“Oh~ her sis-ter,” Yujie teased.

Ruan Ying sighed, “Seriously, can you stop being so weird? Is your heart made of 24-karat pure filth? It’s her real sister. She dropped Fei-Fei off when we started freshman year, we’ve all seen her.”

“I’m just joking! The sister is gorgeous, I know. I wish a beautiful sister like that was my wife—would that make Fei-chan call me her sister-in-law?”

Ruan Ying was reaching her limit. “I am begging you, please shut up.”

***

Ming Fei had no capacity to pay attention to her roommates’ banter. Grabbing her headphones, she carefully—almost reverently, clicked on the red notification.

Fu Zhisu had sent three messages.

[Sister: Sorry, I was busy today and only just got free.]

[Sister: I’m not sure if this is the effect you wanted. I haven’t really taken these types of requests before. Let’s make this one free]

[Voice Recording 0:06]

“Bad puppy, you’re going to get a spanking if you don’t listen”

The melodious, alluring voice spilled out, carrying a deliberate, low-pitched coaxing and an undeniable edge of command. Ming Fei immediately envisioned herself draped across the other woman’s lap, feeling the sting of a palm against her skin.

She bit her lip hard.

She was going to lose her mind.