Feng Manman used this opportunity to brainwash her. As long as she succeeded, Lord Jing would definitely treat her well.
Mrs. Qiao thought that if she helped the Xiao family earn this merit, General Xiao would definitely be grateful to her.
Hence, the two of them hit it off. They snatched the power to manage the family and created a fire to lure away the guards in the front courtyard.
They even swapped in a fake commander's seal while Feng Manman attracted people's attention.
As long as it wasn't the moment when Shangguan Pu mobilized the guards outside the city with the commander's seal, they weren't worried about being discovered.
However, they did not expect General Xiao to take out the commander's seal every day to check it. He could tell at a glance what was real and what was fake.
Now that he thought about it, the assassin back then was probably arranged by Shangguan Pu to give Feng Manman the opportunity to save his life.