Houston talked to My9 on Thursday night for an interview set to air Monday. The interview took place at New Hope Baptist Church in Newark, N.J., where Whitney first wowed a congregation as a girl and where her funeral was held Feb. 18.

Cissy Houston says her daughter “accomplished a whole lot in the short time that she had here” and “was a very wonderful person.” She says she doesn’t blame herself for what happened to her because she knows she did the best she could.

Whitney Houston’s death has been ruled an accidental drowning, with heart disease and cocaine use listed as contributing factors.