According to TMZ, the devastating accident happened after a storm hit the couple's boat and left their catamaran in rough waters, causing their two dogs to fall out. Her husband, Jorge Sestini, dived in after her in an attempt to save her life, but it was too late.
Personal friend and trainer Cau Saad told Leo Dias: "Carol jumped into the sea to save the two dogs that had fallen in the wind".
"It was just her, her husband and the puppies on the boat. He had to swim three hours to the coast to survive".
Newlyweds Caroline Bittencourt and Jorge Sestini were sailing off the coast of Sao Paulo, Brazil, on Monday afternoon when their trip took a awful turn for the worst.
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"But he could see her disappearing under the water and he couldn't reach her as the storm separated them".
Bittencourt, who also worked as a TV presenter, made headlines after she was asked to leave Brazilian ex-footballer Ronaldo's wedding to Daniella Cicarelli back in February 2005.
Her modeling agency OXYgen Models told Globo: "We are grateful for all the trust she has placed in us in these years of work and partnership, our condolences to the friends and family of the victim".
In an Instagram post that published on April 29, Isabelle wrote that she was grateful for the support and messages that her family has received. "This energy drive fills our hearts with so much love".
Bittencourt's death comes days after the death of Tales Soares, 26, who died after collapsing on the catwalk Saturday during Sao Paulo Fashion Week.