The Transport Accident Investigation Commission (TAIC) has already established that pilot errors were ultimately responsible for the balloon crash.
At the time, Mr Hopping had cannabis in his system.
Despite a relationship that spanned nearly two decades, Ms Livingston said neither she nor her husband knew anything about Mr Hopping's drug use.
At the time the balloon went down, his medical certificate had lapsed, Mrs Livingston said.
Mrs Livingston said that, as a contractor, Mr Hopping was in charge of the maintenance of the balloon and was required to have a current balloon pilot licence and medical certificate, although they did not monitor this closely.
They were satisfied that Mr Hopping's operations were competent and professional, she said.
"We felt no need for close supervision or intensive oversight," Mrs Livingston said. "We just took his word."
The inquest continues.