How would you describe this evil woman for what she does?

She made her daughter abort her baby 6 months after the wedding, because she thought if people knew that her daughter was pregnant before the wedding she would look like a slut. Now her daughter is mentally scarred for life and she does not care. Her son was going to cancel getting married two days before the wedding. So he went and asked his father what he should do and his father said pull of the wedding because it is a lifetime commitment, but then she came along forced him to marry her so now he is a mental nutcase. She would antagonize her husband all the time by making him angry so he would take his frustration out on the kids and beat them up which she enjoyed. She gossips trying to find peoples personal Information and back stabs everyone including her children and grandchildren with no mercy. She loves to friction in her family and cause anger and pain by turning everyone against each other. She is remorseless in what she does and has no mercy on anyone. She also tried to force her daughter in law to go to go to a family function while she was extremely sick. She loves to have people become her slave because she is a very demanding person and usually she gets her way.