Sandalie Jean-Baptiste, the only survivor of a car wreck that killed three family members, remained in critical condition Friday at Broward Health North, according to a hospital spokeswoman.

Jean-Baptiste, 20, was riding in a Lexus sport utility vehicle driven by her step-sister Nadege Theodore when the SUV careened off Interstate 95, crashed into a fence and ended up in a Deerfield Beach lake.

Killed were Theodore, Theodore’s 15-year-old daughter Lyne Theodore and Theodore’s 16-year-old nephew Guivens Daverman.

The group was heading back from the Town Center at Boca Raton mall after a shopping excursion for school supplies Wednesday night when they were involved in a three-vehicle accident. An investigation is pending.

Jean-Baptiste was pulled from the lake minutes after the emergency call came in. So were Theodore and Daverman, who were pronounced dead at the hospital.

Divers did not find Lyne’s body until Thursday morning, when they learned from family members that she had also been in the car.

On Friday, Edmonde Emmanuel said Jean-Baptiste, her step-sister, is “hanging in there.”

“God wants her to do something good with her life,” she said. “I believe she will make it.”

Jean-Baptiste immigrated to the United States from Haiti in 2006, and she dreamed of becoming an anesthesiologist.

Meanwhile, Emmanuel said she spent Friday working on funeral arrangements for her sister, niece and nephew.

“It is very hard right now,” Emmanuel said.