Linda O'Leary reportedly had alcohol on her breath following a fatal crash in Muskoka this summer.
That's according to recently unsealed search warrant documents obtained by CBC News.
In the documents, police allege "Mrs. O'Leary was administered an alcohol screening device test and registered an alert. She was subsequently served a three-day driver's licence suspension."
Police added, "She claims to have consumed a drink of vodka following the collision and prior to the breath test."
O'Leary's lawyer Brian Greenspan has insisted his client was not intoxicated at the time of the crash, saying no one could have avoided the collision with an unlit boat on a moonless night.
The wife of entrepreneur and media personality Kevin O'Leary is charged with careless operation of a vessel under the Canada Shipping Act and if found guilty, she could face a $10,000 fine.
Meanwwhile, the New York man driving the other boat is charged with failing to exhibit navigation lights.
The O'Leary case is due to return to court on January 16.