Anna Kepner and the stepbrother currently under investigation in her death were "best friends," according to her stepmother.

Shauntel Hudson appeared in court on Friday for an emergency custody hearing after her ex-husband, Thomas Hudson, petitioned the court to remove his youngest daughter from her mother's residence and grant him custody.

He filed that petition after learning that his 16-year-old son was under investigation by the FBI in the death of Anna, who "was found asphyxiated under the bed in the room which she shared with [his teenage son]," according to a court filing obtained by PEOPLE.

Shauntel testified in court about the family's time on the cruise and how Anna came to share a room with her stepbrother and 14-year-old half-brother.

Shauntel testified that the thre

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