Arias gave birth to the couple's daughter, Penelope, on February 24.
Judge Maria Korvick ruled that a trust must be drawn up for Fernandez's daughter and that Arias and Fernandez's mother, Maritza Gomez Fernandez, would oversee it, per CBS Miami. The money in the trust could be withdrawn to provide care for Fernandez's daughter.
The estate has been valued at between $2 million and $3 million, according to CBS Miami.
The legal fallout is not over, however, as the families of Eduardo Rivero and Emilio Macias—who died in the fatal boat crash along with Fernandez—are each suing the Fernandez estate for $2 million in negligence and personal injury damages.
The family plans on fighting those lawsuits, however.
"The reason is this, it’s our position that everything in the estate is for the benefit of the child," Fernandez's mother told CBS Miami.