Interviewed on the Nine Network's Today show, Kerry Smith-Douglas said: "She'll probably pop a cork of champagne and then roll up a big marijuana joint the size of a cigar and kick back and enjoy herself."
Smith-Douglas, who was introduced as the Corby family's ex-lawyer - a claim they hotly denied late last night - later insisted she had been joking.
Corby, who was arrested with 4.2kg of cannabis in her bodyboard carrier, was given a 20-year jail term which was cut by five years in 2012. That and smaller remissions mean she has served two-thirds of her sentence, making her eligible for parole.
Her every step in Bali is likely to be filmed and photographed, at least for the first few weeks or months.
And while there has been speculation that she could receive millions of dollars for a TV interview, that might prompt legal action for proceeds of crime by Australian authorities.
As Prime Minister Tony Abbott told Fairfax Radio yesterday: "The old principle is crime should not pay."
Asked about Corby's likely release, the PM was guarded, noting it was "ultimately a matter for the Indonesian justice system", even if that system was "a little different to ours".
While Mercedes Corby denies an interview deal has been signed, Channel Nine will screen a telemovie, Schapelle, next Monday. Corby's mother, Rosleigh Rose, has said it was "absolutely disgusting" that the Queensland Government provided A$567,000 ($617,000 ) in funding.