Whincup has said the decision was mutual and the couple 'have decided not to be together any more'.
Grant Hackett's mother has made a heartfelt plea to the embattled athlete to come out of hiding, after the the swimming star was arrested over ugly scenes in his family's Gold Coast home on Wednesday.
The 29-year-old man was fatally stabbed in the neck on Saturday, after he allegedly flew into a jealous rage when Ms Cahill brought a Revesby man, 36, home from the pub.
Police arrested a 36-year-old man and Ms Cahill, she was charged with murder on Saturday afternoon.
Queensland man Glenn Dickson, pictured right and left with partnerr Jessie Jenssen, is fighting for life in Cairns Hospital after being mauled by a shark off Hinchinbrook Island on Saturday.