Veteran singer Dionne Warwick is still upset over claims that her sister, Dee Dee Warick, molested their cousin Whitney Houston. The accusations were made by Houston's brother Gary Garland-Houston and the singer's longtime assistant, Mary Jones, in Kevin Macdonald's documentary, Whitney.

During a recent interview with PEOPLE, Warwick addressed the claims and defended her late sister's honor. "All I can say about Dee Dee is that she was a loving, caring, giving person," she explained. "What was depicted of her is absolutely untrue and something I will never forgive."

This isn't the first time Warwick has publicly addressed the claims made in the documentary. In an interview with Larry King, Warwick called the allegations "evil" and "total hogwash."

The singer said, "My sister would never, ever have done anything to do any harm to any child, especially within our family. And for those lies to be perpetuated in this so-called documentary film, I think it's evil."

Cissy Houston, the legendary singer's mother, revealed her shock and "difficulty" believing the claims shortly after the film was released.

In a statement to PEOPLE, Cissy said, "We cannot, however, overstate the shock and horror we feel and the difficulty we have believing that my niece Dee Dee Warwick (Dionne’s sister) molested two of my three children."