I have sooo many questions...
If she kills and butchers every guest she has... how has she not been found out and arrested?
I also have to assume that if the other maids don’t know about their mistress being a cannibal, that the mistress is the one who is butchering the people up so well, that nobody can tell that these pieces of meat their preparing were ever people...
All that said, the mistress came off as pretty melodramatic in this chapter. Assuming cannibalism as a mental illness, she may have an almost addicted compulsion to eat human flesh, but she could still survive just fine off normal meats. She’s not a vampire, because they only drink blood and the maids are not required to do stereotypical vampire things like drawing the curtains shut during the day.
Given this is listed as yuri, I’m more worried that she’ll end up eating the MC. But no way this ends happily.