Kris Smith split from Dannii Minogue because he was tired of her parents being around.
The former rugby player was reportedly upset at Dannii's parents Ron and Carol constantly being with them and their 21-month-old baby, Ethan, according to a close friend.
The source told the Daily Mirror newspaper: "Kris is just an easy-going guy.
"He's not up for all the stuff that goes along with being part of the Minogue corporation."
Dannii and Ethan have been staying with Ron and Carol in Australia since the split became public earlier this week.
Another source said she was not aware that Kris had a problem with her parents, adding: "She is devastated by the split."
It was claimed yesterday the argument that led to the couple separating, after four years together, was over a passport holder Kris had bought Dannii as a joke present at Christmas because he thought her old one was "tatty from so much travelling".
A source said: "There have been a lot of problems and the pair were living separate lives. Dannii is a workaholic, Kris wanted her to slow down and enjoy life a bit more but you don't tell a Minogue girl that.
Kris is now believed to be searching for a new home in Melbourne's South Yarra - close to where he works on Channel 10's The Project.
Dannii has admitted she wants to take some time out following the split.
She wrote on twitter: "Hi Tweet peeps. Needing to retreat for a while.
"Thank you for your ever loving continued support.(sic)"
- BANG! Showbiz