Bethenny Frankel, Hubby Lost at Sea for 20 Hours

Skinnygirl's scary sailing nightmare!

Bethenny Frankel and husband Jason Hoppy nearly became real-life castaways this past weekend on a sailing trip gone horribly awry -- when the twosome were lost at sea for 20 terrifying hours.

"I was on a sailboat on Saturday that was supposed to be eight hours and it ended up being 20 because were lost at sea," the reality star and cookbook author, 40, told "E! News."

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The captain of the vessel called the Coast Guard after the ship was hit by a "big wave," she explained. "It was very scary. Absolutely traumatic."

Bound for Nantucket, MA from Block Island, the boat's GPS malfunctioned, leaving the 10 passengers (including a Bravo TV crew) panic-stricken.

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"We were in the middle of the deep sea with no land or anybody near us," she said. "The captain had never, in 30 years, called the Coast Guard."

During the ordeal, Frankel couldn't help but think of Bryn, her 15-month-old daughter with Hoppy.

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Says Frankel: "I was thinking, Oh, my God, Bryn! I'm not going to be there at six o'clock in the morning when she wakes up and she's going to wonder where Mommy is and gosh, if something were to happen to me, what would happen to her. I was having horrendous thoughts."

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