"Zhang Yang, I'm off to work, don't cause any trouble for my sister at home," she said.

"My cousin is a dance teacher, but her students are on holiday recently, so she has no classes, and my sister is resting at home for a while. Don't disturb her, otherwise, it's not just you, even I would get kicked out," she warned.

"We both just graduated and are interning, and we definitely can't afford to rent a place yet."

Zhang Yang nodded repeatedly as his girlfriend, Zhang Xiaoman, gave him numerous reminders, but he had his own unspoken hardships.

His girlfriend, Xiao Man, had already been working as an intern for half a month, while he was supposed to start his internship at a major hospital, but the process was complicated, and it looked like he would have to wait another week.

During this time, he stayed with his girlfriend at her cousin's house.

Unfortunately, the cousin was unimaginably beautiful, and although his girlfriend was also considered the belle of her department, her cousin was even more stunning, being a dance teacher with a flawless figure and a demeanor that was utterly captivating.

But that wasn't the craziest part for Zhang Yang—it was the secret he stumbled upon.

After Zhang Xiaoman left, Zhang Yang, as usual, cleaned the house.

Staying at someone else's place, that much sense of duty Zhang Yang still possessed.

When he got to the bathroom, Zhang Yang couldn't help but swallow his saliva.

He knew, unless something unusual happened, he would see that thing that made his blood surge.

Sure enough, in a small basin, a wet pair of panties was wadded up and left there.

Though he and his girlfriend hadn't crossed certain boundaries, he had seen enough to know that these panties weren't his girlfriend's.

They were naturally her beautiful sister, Xia Xue's.

And on those panties, the large patch of slippery white fluid, was the secret Zhang Yang had discovered.

Being a medical student, he knew well that this kind of copious fluid was only produced when a woman reached the peak of excitement.

Xia Xue's boyfriend was abroad on business all year round, so it was clear that Xia Xue must have been comforting herself almost daily.

Usually before a shower, and she would leave the panties here, only to wash them the next day during her morning routine.

As Xia Xue's dance classes typically took place in the evening, her schedule tended to be rather lax.

Zhang Yang had completely figured out her daily habits.

Every time he saw the panties, Zhang Yang couldn't help but fantasize about Xia Xue wearing them, her fingers manipulating inside.

By now Zhang Yang was aroused, unbearably so.

This was all thanks to his girlfriend, though they had been dating for four years, she only helped him out with her hands and insisted on waiting until marriage to go all the way.

Zhang Yang couldn't help but pick up the enticing pair of panties to examine closely, he wasn't a pervert, he just couldn't resist.

It felt like he could directly connect with her mysterious place this way.

He couldn't stand it anymore, he needed to cool down, so Zhang Yang turned on the cold water, taking a cold shower.

Since it was an hour before his sister-in-law would wake up, Zhang Yang didn't bother locking the door.

But unexpectedly, Xia Xue, in urgent need to urinate, rushed in.

Still not fully awake, Xia Xue didn't notice Zhang Yang as she entered.

She sat down on the toilet, and as a rapid flow of water was accompanied by a light moan of relief from Xia Xue, Zhang Yang was stupefied.

The sister-in-law, incredibly, had no hair—even more, she had a perfect structure, a beautiful thin line.

At that moment, Xia Xue suddenly sensed something long and thick swaying in her peripheral vision.

The next second, her eyes widened, and she finally fully woke up.

Ah!!!

"Zhang Yang, how can you be here?" she exclaimed.

While asking, she covered her eyes.

But her mind was filled with the enormous thing she had just seen, "How could it be so big? That's too exaggerated."

Xia Xue even thought she had seen it wrong and instinctively took another peek through her fingers, "Oh my god, my dear sister is too lucky, but can she even handle it?"

Zhang Yang hurriedly covered his lower body with a bath towel at that moment, but the bulging big open top made him extremely embarrassed too.

"Sis, I... I didn't mean to."

But having said that, he felt something was off and couldn't help but softly remind her, "Sis, I was taking a shower here, and then you just barged in."

Xia Xue only then remembered what had happened and blurted out, "Then why didn't you lock the door?"

Having said that, Xia Xue lifted her butt, covered her face, and ran out.

"So white, so perky!"

This little butt, simply irresistible, truly fitting of a dance teacher, her body proportions are really too beautiful.

Yet Zhang Yang couldn't help but smile bitterly, originally wanting a shower to cool down, and now, the fire was even more intense.

He had no choice but to wait for his girlfriend to come back to discuss whether they could not wait until marriage.

Stepping out of the bathroom, Xia Xue was getting ready in a yoga outfit.

After getting up, a cup of black coffee, then an hour of yoga, and only after that would she eat.

In Xia Xue's words, if she didn't stretch for a long time, her body would "rust," which, for a dance teacher like her, would definitely be laughable.

"You young man, remember to lock the door when you take a shower next time."

Xia Xue scolded jokingly and let the incident slide, and Zhang Yang also breathed a sigh of relief.

Zhang Yang, of course, agreed hurriedly and without delay, ultimately he was staying here, and it was already lucky that Xia Xue hadn't kicked him out.

Next, Zhang Yang pretended to watch television, but his gaze never moved away from Xia Xue doing yoga straight ahead.

The tight yoga pants not only made Xia Xue's legs look exceptionally long, but also perfectly outlined the curves of her buttocks and that bald holy ground he had just seen.

A simple white vest was stretched extra round by the generous wind.

This woman was truly top-notch, and as time passed, the fine sweat made Xia Xue emit an enchanting allure.

Zhang Yang swallowed his saliva, watching Xia Xue perform one difficult move after another.

He dared not imagine, if he could discuss life with Xia Xue, how many new positions they could unlock.

Zhang Yang was somewhat envious of Xia Xue's boyfriend, not knowing how much he had enjoyed.

If Xia Xue knew Zhang Yang's thoughts, she would definitely drool extensively.

Her boyfriend, well, he really was not good in that area, belonging to the type who was quick to shoot.

And yet he always said that it was because she was too tight and too charming, which left Xia Xue speechless.

It was another agonizing day, Zhang Yang smiled bitterly, completely unsure whether having such a great big sister was a blessing or a curse.

Finally, when his girlfriend got off work and came back, they had dinner, and Zhang Yang pulled Zhang Xiaoman into the room.

"Xiao Man, give it to me, please, now that we both have settled in our jobs, I won't let you down."

While saying that, Zhang Yang went ahead and kissed her impatiently, quickly stripping Zhang Xiaoman naked.

It must be said, not only was Zhang Xiaoman beautiful, but her figure was also quite good, although not as elegant as Xia Xue, she could still pass for a model.

Zhang Xiaoman was also left breathless by Zhang Yang, her chest covered in Zhang Yang's saliva.

Yet, still, she protected her private parts with her hands tightly at the last moment.

"Zhang Yang, you promised me."