Response from Trinette:
My neighbour is one of the sweetest ladies I know on this planet earth. Extremely rude sounds unbelievable to me...
I made a mistake by telling her Natsumi would arrive in the evening instead of in the morning. I can imagine that she was a little confused by this what made her look kind of rude?
She is free to walk in the apartment to keep it clean. Natsumi was renting a room and not the whole apartment.