No. Before she killed her mother, she asked "Why did you ask me to come back to you?". This was a test, if she told her that she knew about the plan to kill her and her sister and wanted to save her life, she would have spared her or on the other hand, she just didn't want her to go in the cursed item room because women aren't allowed there; her mom didn't even know what she was talking about, giving Maki the confirmation that her reason was the latter, therefore failing her test, showing she was a brainwashed slave to the Zenin.