We know that in ancient times, there were maids in big families. These maids naturally wait on their masters like nannies, washing and cooking every day, and so on. In short, they are the kind of people who do everything at home
We also know that ancient women also had personal maids. These maids often followed these young ladies when they were young, and it is not an exaggeration to say that they are sisters. Therefore, even the young lady will follow after marriage, and sometimes she will directly be the concubine of her uncle. Sometimes, if she is favored, the girl's life will be more comfortable.
Of course, besides this kind of maid, there is another kind of maid that has the same function, and it is used by these women to keep their seats. These maids serve men as wives instead of women when they are away, or watch and guide them when their husbands and wives are consummated. They are also studying. If anything goes wrong, they will go into battle by themselves.