The man driving the boat, Deontae Davis, was not injured.
"He reached down to pick up a cell phone and that's the moment they hit it," says Rymer.
Rymer says the two had been friends since childhood. While Davis does have a criminal past, Rymer is sure his sister's death was accidental.
"I don't Want people to misconstrue anything about my sister or Tez," says Rymer. "He loved her very much and I know he'd never hurt her. Unfortunately this is just a freak accident."
The TWRA interviewed Davis, and is now waiting on toxicology results before determining if charges could be filed.
Meanwhile, Thompson's family works to find homes for her four dogs and waits for answers.
Those who knew her best, have posted pictures on Facebook remembering the woman, who friends say never met a stranger and cared for friends like family.
"All that brother, brother, sister, sister, yah know, it was just me and her, but her friends were like family," says Rymer.
A month before her death, Misty Thompson's home burned. She lost most of what she owned.
Her friends and family have set up a fund at Tennessee Valley Federal Credit Union, to help pay for funeral expenses, and support her two sons. You can donate at any branch to the Misty Rymer Thompson Fund.