Ge Chunying accidentally found out about this while she was looking for something to use against the other side concubine of the second prince.
Thus, she came up with this idea to kill two birds with one stone.
In the future, if Xiao Baili successfully married into that side concubine's family and this matter was exposed, Xiao Hanzheng definitely wouldn't ignore it and would definitely take revenge.
This way, she could borrow Xiao Hanzheng's hands to deal with that side concubine's family.
That side concubine relied on her good family background to constantly suppress Ge Chunying.
If she lost her family background, Ge Chunying believed that she was no match for her.
As the people that Xiao Hanzheng arranged knew the weakness of the trusted servant girl by Ge Chunying's side, they bribed her.
Therefore, the conversation between the two sisters was transmitted back to Shi Qingluo.
