The other party was his wife and a pregnant woman.
Li Muyu and Li Muyang both knew how scheming Liu Xiufang was, and how terrible her values and character were. However, Li Mufeng never planned to break up with Liu Xiufang from the beginning, and he even accepted her offer.| As for adultery and betrayal, at the very least, for the sake of the child, they should live a good life instead of doing what Liu Xiufang did in the past and using violence to take revenge on a pregnant woman.
In short, when Li Muyu and Li Muyang were in their hometown, they had some guesses about Li Mufeng and Liu Xiufang. After returning to Sun City to investigate seriously, they never decided to acknowledge Li Mufeng as their elder brother.
If Li Mufeng hadn't suddenly appeared in front of Li Muyao today, Li Muyu and Li Muyang would have pretended not to see him.