Seeing as she'll be in the three part special "The Queens' Fight", i believe she is Audrey Bourgeois, the wife of André Bourgeois and mother of Chloé Bourgeois.
Hear me out: I know that Chloé was akumatized as "Anti-Bug", but the upcoming "Queen Wasp" bears a resemblance to "Queen Bee", who is Chloé's future alias. Then comes the Malediktor, which is a play on words for Valedictorian and Dictator. That said, it would obviously be André.
In other words: There's going to be a family reunion....and it's not the pleasant kind.