@Dr.P i don't blame her, the death of her mother made her blind and her Family that became a place with people that cared about her, against her better judgement and the truth, she simply accepted their version of the story, also thanks to all the evidence that were pointing at Bianca. they even used the fact that Bianca was one of the most respected Noble Ladies and questioned her how could someone like Bianca to be really interested in becoming friends with Maria.
the plan was perfect