Anyway, Wei We would be Zhai Hua's nephew in the future.
If Wei Wei were to study in a good kindergarten, he would learn how to be more self-disciplined and obedient. Naturally, when Wei Wei became successful when he grew up in the future, he would trouble Zhai Hua and Wei De less then.
In short, Wei De meant to say that he and Zhai Hua were inseparable. He even made it sound as if Wei Wei was the responsibility of both Zhai Hua and him.
As long as Wei Wei was doing well, he and Zhai Hua would have less trouble in the future. If Wei Wei did not pick up the right values and trouble others, he and Zhai Hua would suffer when that time came.
Of course, the Zhai family would not care whether Wei De was in any trouble but they would not be able to ignore it if Zhai Hua was facing problems in her life.