Cissy Houston arrives to visit Bobbi Kristina Brown at the Emory University Hospital on February 8, 2015 in Atlanta, Georgia

Cissy Houston arrives to visit Bobbi Kristina Brown at the Emory University Hospital on February 8, 2015 in Atlanta, Georgia

*The drama between Bobbi Kristina Brown’s grandmother, Cissy Houston, and her father Bobby Brown, is said to be getting ugly as she reportedly plans to challenge him after he filed to be the head of her estate.

According to OK! Magazine Wednesday, an insider claimed, “Cissy will fight to the grave.”

Bobbi Kristina remains in a rehab facility after being found unconscious on Jan. 31 in the bathtub of her Roswell, Ga. home. The family has been fighting over what to do with her money and assets.

Currently, only Bobby is in charge of Bobbi Kristina’s medical decisions. While it has been reported that BK will get $20 million of her inheritance from her mother, it hasn’t been confirmed what the exact amount is. She was supposed to get 10 percent of it when she turned 21 back in March of 2014, but has yet to receive it, according to OK magazine.

“It was modified and with good reason,” an insider said.

They didn’t give details but at the time rumors swirled that Bobbi Kristina was struggling with drug abuse.

Cissy’s lawyer David Long-Daniels spoke on the ordeal on her behalf and said recently, “This is a family matter involving sensitive information. We hope to resolve this in a manner that is respectful of Bobbi Kristina’s sensitive health information. The Houston family has always looked out for the best interest of Bobbi Kristina Brown. The family has done so all her life and will continue to do so. We trust that others have the same objective.”