On Friday, the TV star, 44, told Fitzy & Wippa that at the time the pictures were taken Cornish, 23, was having relationship issues and he was counselling her during a break from dance rehearsals.
The Channel Seven star and his wife-of-11-years were joined by their three daughters, Sailor, ten, Scout, six and Sunday, 11 months, for the summer excursion
Lily, 22, who is partnered with Grant, 44, on the next season of DWTS: All Stars, reposted New Idea s apology on Instagram on Monday, and also shared a 7News Sydney report on the retraction
The publication printed an apology in its Monday edition and online, acknowledging the story was false and that Grant, 44, and Lily, 22, never had an affair