She should be the youngest of the three maids.
People with moles on their eyebrows are said, from the perspective of physiognomy, to achieve great success. Moreover, these individuals are especially intelligent.
Qin Niu had learned some wisdom from the Yan Family's method of managing servants.
Although maids were servants, once they entered the household, they also counted as half a member of the family.
They might not amount to anything significant, but sometimes they could ruin their master's important affairs.
If they intended to seek revenge on their masters, it would be an utterly terrifying matter.
It could even lead to disastrous consequences.
Qin Niu had heard of a case where a small landlord bought a maid who was made to work all day and was given only scanty meals, always the worst kind of food. And, if he was displeased, he would drag her into his room to vent his bestial desires.
One time, the mistress caught them in the act.