Su He ran into the landlord's wife who brought Xiao Yun to play with Da Huang, and was immediately amazed. However, the landlord visiting a tenant's home seemed to cross a line, which is why she was suspicious.
But, Su He forgot her own status, she was the youngest, not the eldest, and there was no way Su Qing would be intimidated by her, so he let Da Huang go right there.
Having experienced the "big forest" outside, Da Huang now looked down on Su He's crooked tree.
It's not that he looked down on her, mainly because Su He didn't wear black stockings. For a true "bootlicker" with a black stockings fetish, she had undoubtedly lost her greatest appeal.
Therefore, to protect his own big forest, Da Huang betrayed her, making Su He furious, but in the end, she could only go home in frustration.
