Zsa Zsa Gabor's Daughter Wants Conservatorship

Zsa Zsa Gabor's daughter claims her mom has been isolated and sedated by hubby Prince Frederic von Anhalt and wants to wrestle control from him in court.

Francesca Hilton has hired a lawyer to get a conservatorship, giving her the power to make medical and financial decisions for Zsa Zsa.

Francesca is suspicious of von A-Hole's motives, claiming he took out a $700,000 loan on the couple's mega-mansion and then let the loan go into default. TMZ previously investigated the default and found it was a bank error and it was corrected.

Francesca has been estranged from Zsa Zsa for years.

9:36 AM PST -- Prince von A-hole is lashing back ... telling TMZ, "I did nothing wrong! My wife is in good hands, her doctors and nurses will tell anyone that. She could not be better."

He adds, "Francesca wants her money ... that's all! She has been waiting 65 years for that ... it's just too bad for Francesca that I'm here."

A-hole also insists Francesca chose the worst time to pick a legal fight -- claiming during a news conference this morning ... he's in the process of selling his and Zsa Zsa's mansion to pay for the 95-year-old's medical bills.