Erendira Wallenda assured the public that she felt prepared for the feat because of her training.
Speaking to reporters, Wallenda described the experience as "amazing" and "beautiful", and said she had hung twice from her teeth, listening to music throughout so as to block out any sound from spectators below.
"There are no words; it was lovely", Wallenda said moments after returning to the ground.
Five years ago today, Nik Wallenda walked 550 metres on a tightrope over the falls, from the American to the Canadian side.
"I respect this man so much more", she said of her husband after landing.
"In five more years", he joked, "I'm going to hang by one tooth, 800 feet above the falls". "I put my mind back to my backyard where I train all the time".
Her husband, Nik Wallenda, has called her a "ballerina in the air".
I don't know about you, but there is no amount of money I'd do that for.
"I was like, 'Absolutely, '" Wallenda said he responded. "That's what I live for". Erendira's goal is to break her husband's record.
Wallenda bit onto a customized mouthpiece that was attached to the bottom of a black helicopter hovering over the Horseshoe Falls.
"Something extremely unique to anywhere around the world", he added.
"It was awesome", said Romano.
Helicopter pilot Paul Barth said Wallenda signaled to him to fly higher during the routine to get away from the wind.
The stunt was made possible with support from the city of Niagara Falls and Niagara County, which contributed $35,000 each.
"This is my passion, this is my life", Erendira said.