Cynthia Susanne said Thursday she does not believe some passengers' suggestions that he started the confrontation that ended with him exiting a parked plane via an emergency chute at Kennedy Airport.
She said Slater is extraordinarily tolerant and patient.
Susanne said she hasn't spoken to him since the incident on the Pittsburgh-New York flight. But she added he probably was as baffled as she was about the attention it was getting.
The couple have a son together. She spoke on NBC's "Today" show.
Slater is out on bail after being arraigned on criminal mischief and reckless endangerment charges.
Meanwhile, his employer had a little fun with the incident, released a humorous take on the JetBlue blog as Slater's Internet fame showed no signs of slowing. The now legendary exploit has even been immortalized in a CGI video by the same Taiwanese company that make the Tiger Woods and Al Gore animations.
JetBlue passengers who witnessed the meltdown say they laughed when they were getting off a plane and heard a curse-filled announcement.
Instead of being told where to go to find their luggage or catch their connecting flights they heard someone offering an expletive-laden suggestion. Passenger Kati Doebler said travelers gasped and giggled after flight attendant Steven Slater's comments Monday.