The person who entered first was indeed Nie Qu, as seen in the video. His attire remained unchanged, still the white lab coat and research uniform. His brow was furrowed, and although he was physically present, his mind seemed to be preoccupied with something distressing.

Behind him was Nie Yan, who had lost a lot of weight but could stand and walk with both legs intact.

The boy's smile was brighter than ever before. He glanced past his excited mother, hugged Nie Kongsang tightly, and spun her around: "Sister, I missed you so much!"

Kong Sang grinned: "I miss Ayan too."

Feeling the warning in her brother's eyes as he looked at her because of her contact with her sister, Nie Yan was overjoyed. This was wonderful…

"Stop fooling around. If you've repented, behave yourself. If you provoke your sister again, you won't be able to come back so easily next time." Nie Qu's cold and stern voice made Nie Yan restrain himself.

He put Nie Kongsang down and said earnestly, "Don't worry, Dad, I will definitely cherish my sister."

Nie Qu nodded in satisfaction, then said a few words to Lan Yun, looked at his children, and finally his gaze fell on Yu Wei.

"It's good that you're back. I know about what happened to you abroad. You did very well. The impoverished nobleman who adopted you is surnamed Yu. Although he didn't take care of you for many years, I think you don't want to change your name to Yu Wei. From now on, you'll be called Nie Yu Wei."

Yu Wei bowed her head: "Thank you, Patriarch Nie."

Nie Qu's eyebrows twitched slightly, but he didn't respond. Nie Yan said with a grin, "Second sister, what's your name?"

Yu Wei looked up, paused for a moment, and then said, "Thank you, Dad."

Nie Qu nodded: "We haven't spent more than 20 years together, I know you're not used to it, but we're family, take it slow, everyone go down, let's get together for a meal again tomorrow, I'm a little tired today."

Kong Sang immediately said worriedly, "Dad, you should go and rest. If you get sick, you won't be able to do any research. You must be careful."

Nie Qu patted Kong Sang's head and said with relief, "Okay, Dad understands."

Watching Lan Yun leave with Nie Qu's arm around her, Yu Wei's eyes flickered slightly. This family is really strange. Without peeling back the layers, they seem perfectly normal and warm.

But what lies beneath that layer of human skin, is it something terrifying and horrifying?

"Second sister, here, this is a gift to welcome you home."

A delicate chain bracelet appeared in the boy's hand, and his angelic smile made it impossible for anyone to refuse. But Yu Wei knew just how wicked this boy could be...

Suppressing the discomfort in her eyes, Yu Wei smiled and accepted the gift, saying, "Thank you, little brother."

Nie Yan smiled happily and wanted to hug her, but an arm blocked her way: "Yan, Yu Wei just got back and can't handle your enthusiasm. Hug her next time."

The blood needle in his palm sank back into her skin. Nie Yan said regretfully, "Alright then, let's play together again once Second Sister gets used to it."

Despite the stinging pain, Kong Sang expressionlessly pulled out the blood-stained needle that had been inserted during their earlier embrace, and said with a smile, "You just got back, go and rest."

If it weren't for the system warning and her adjusting the angle in time, her left kidney would have been ruined...

As soon as the needle was pulled out, it immediately turned into blood. Yu Wei's expression changed as she sensitively detected the smell of blood.

Before they could even figure out what was going on, Nie Jingxing slapped Nie Yan to the ground. They were standing at the bottom of the stairs, and Nie Yan lost his balance and tumbled down the stairs.

Yu Wei gasped. What was going on?

When she turned around, Kong Sang had already been picked up, but she noticed a trace of blood on Kong Sang's lower back.

His eyes narrowed; it was... Nie Yan's mess from the hug earlier.

It's unbelievable that Nie Yan, who is only 18 years old, has already awakened the ability to mutate blood. Isn't that an ability that Nie Yan only revealed after he turned 22?

Thrown onto the bed, her shirt torn off, Kong Sang lay prone as Nie Jingxing applied medicine to her.

"Brother, I misjudged. I shouldn't have let him go to the base. Not only have his legs recovered, but his abilities have also fully evolved. His blood can now be used to injure people. I gave him a powerful opportunity. I was so stupid."

"He is his father's child. It's no use stopping him. He will come into contact with those things sooner or later. We will not stop becoming stronger unless we die."

Kong Sang's voice was muffled: "But I'm getting weaker and weaker, that's not fair."

After a moment of silence behind her, Nie Jingxing turned her over, their foreheads touching, his deep eyes filled with utmost seriousness: "I will make sure you live well, no matter the cost."

Why does everyone want her to live well?

Nie Jingxing pressed down on his lips, and Kong Sang's eyes flickered slightly as she turned her head away.

The man seemed to have a moment of anger, but he quickly suppressed it, tore open Kong Sang's thin shirt, and kissed her neck and collarbone...

Knowing that refusing again would be masochism, Kong Sang suppressed her disgust and endured it. The stinging pain from the kiss marks on her body was nothing compared to the pain in her heart...

Nie Jingxing, you will never know how important you were to me. You are the one I hate the most in the entire Nie family!

As before, Nie Jingxing would restrain himself when he sensed Kong Sang's obedience. If she resisted fiercely, he was sure that it wouldn't just be a few kisses, but that she would be forced to submit.

Nie Jingxing is like a proud monarch. You can refuse to force him, but you cannot resist. The more you resist, the more violent the suppression will be.

Over the years, she has managed to understand Nie Jingxing's temperament without completely crossing that line, but the feeling of being trained under his long-term obedience makes it difficult for her to speak out.

Seeing someone and instinctively wanting to obey them—that feeling of shame… she could never forget it, not even in two lifetimes.

Once the person on his body was fast asleep, Kong Sang got dressed and left.

As soon as she stepped outside, Yu Wei, who was waiting at the door, saw the marks on her body and her eyes immediately reddened: "I should have rushed in, I..."

“You did the right thing. If you rushed in, you would have been beaten half to death, and no one in this family would care about you. In the Nie family, apart from Father, the eldest brother’s position is unshakeable. You have to learn to survive.”

Yu Wei said dejectedly, "Kong Sang, I'm sorry, I can't help you."

She could have acted recklessly, even if she couldn't win, at least she would have peace of mind. But she couldn't do that. Thinking of his sacrifice, she had no right to be willful.

Kong Sang shook his head: "Mind your own business. Don't meddle in my affairs, or you'll die quickly."

After passing by Yu Wei, Kong Sang prepared to go for a night run, knowing she wouldn't be able to sleep tonight.

It had rained last night, and the roads were still wet, but Kong Sang ran very fast, constantly shifting his position to dodge the blood needles behind him.

My dear brother is really impatient. He just got back, isn't he going to sleep yet?

Kong Sang also produced a fine needle, but it was a silver needle coated with a potent poison. He twisted his fingers, adjusted the force according to the arc planned by the system, and shot it out.

Even in the darkness, Kong Sang was confident that the needle would hit the mark, but the poison... was effective against those with mutated blood.

Sure enough, after a moment of silence, the blood-red whip swept across.

Kong Sang dodged, but his physical abilities were different from those of the genetically modified individuals. He was a beat too slow and was struck on the back by the whip's tail, which stung painfully.

Damn, this little rascal, her love is truly profound. If it weren't for her, how many older sisters could afford to be like this?

However, she wasn't angry; in fact, she was quite enjoying it. Since she couldn't sleep at night anyway, she treated it as a special kind of exercise.