A month after her sudden death, Brittany Murphy’s mother and husband say they are convinced the actress died of natural causes, not drugs or an eating disorder.

In an interview with The Associated Press on Tuesday, Sharon Murphy and Simon Monjack said that Murphy did not use drugs or alcohol and that they are awaiting a determination from coroner’s officials that will end speculation prescription medicine caused Murphy’s death on Dec. 20 at age 32.

Monjack said some of the prescription medications found in the couple’s Hollywood Hills home belonged to him.

Murphy had mitral valve prolapse, a common condition where a heart valve does not properly close, but doctors said the actress “would live a long and healthy life,” Monjack said.

“She had a fear of dying,” Sharon Murphy said. “She would not take too much caffeine. She wouldn’t even have a glass of champagne on New Year’s. She was just high on life, and people see that as something else I guess.”