Misbehaving step mother

My own father got married second time after 6 years of my own mother's death. First 2 months she was ok. After that she started yelling and complaining about my family members though we didn't do anything bad to her. We welcomed her with respect and gave her one of my brothers room so she can stay with her first husband's daughter. My brother went to other house with his family just for that This lady stay comfortably. She started passing bad comments and bad words to my father. I told her this is not correct as a human being and a wife. You should respect somebody who gave you another life of respect and safety. She always talks about her first husband who dies due to some reason. But my father asked nothing from her. He told I will give your daughter my name to use for her school. From unsafe widow my father gave her a respectful married afe life. Now She is ungratefully says bad things about him. So many things happened as a sign of bad her character. Now it's too much. She quarrelled with my father and tried to touch him to harm him 3 days ago. We want to get rid of her without damaging her so called society image...coz we know what she is originally. Thank you. I left everything to Almighty. You also please advise us.