hi i think i found a bug after corrupting the maid in the morning when dad is standing outside the study i talked to mom in the kitchen and the game froze
People who played this game tested this bug and solved it, here is how: After she tells you to sit down go out and re-enter the room. Interact with the chair and the event will trigger.
Oh crap... The bug you described is related to the Mother, not to Maria... I can't read lol, my bad. In that case, wait for the Dev to see this... sorry.