June 12 - The heiress to the L'Oreal cosmetics empire branded her estranged daughter mentally disturbed on Sunday, as their battle re-erupted over the family billions, entangled in political scandals.

Liliane Bettencourt, left, France's richest woman and of her daughter Francoise Meyers-Bettencourt

Liliane Bettencourt, 89, had made a truce with her daughter Francoise Bettencourt-Meyers in December after months of wrangling over claims that people close to the billionaire had tried to cheat her of her riches.

Their battle broke out again this week when the daughter took legal action against Pascal Wilhelm, the lawyer appointed to manage Bettencourt's affairs if she is incapacitated.

"It would be madness for me to be separated from him," Bettencourt said of Wilhelm, in an interview published in the weekly Journal du Dimanche on Sunday.

"My daughter is unhappy. She is very changeable. She needs to see a therapist given all her psychological problems."

Bettencourt said she refused to see her daughter when she called round this week after lodging the guardianship suit against Wilhelm, whom her lawsuit accuses of conflict of interest, the report said.

"It is tiring to receive someone who is psychologically a bit disturbed," it quoted Bettencourt as saying.

Bettencourt-Meyers has argued that her mother's old age puts her at risk of being cheated by her advisers.

In a statement sent to AFP later on Sunday, the daughter and her family said they were "shocked" by Bettencourt's latest comments and insisted she was "clearly being used".

Bettencourt-Meyers sued a friend of her mother last year for abuse of trust.

The trial broke down, tangled in a web of complex allegations and reports that implicated President Nicolas Sarkozy's government in claims of illegal political funding.