Dannii Minogue’s relationship with Kris Smith broke down after their son’s birth

New reports claim that Dannii Minogue’s four-year romance with Kris Smith broke down because she became “colder” after the birth of their 20-month-old son Ethan.

According to Sydney’s Daily Telegraph, Dannii Minogue’s hands on parents contributed to Kris Smith’s departure.

Kris Smith is believed to have walked away from Minogue Inc. which her parents Ron and Carol Minogue managed.

A friend told the Australian paper: “Kris is just an easygoing guy… He’s not up for all the stuff that goes along with being part of the Minogue corporation.”

Brokenhearted Dannii Minogue, 40, is said to be recovering on holiday, bizarrely at a resort for newlyweds.

Kylie Minogue’ sister is staying at honeymoon resort Hayman Island at the Great Barrier Reef with son Ethan, while painting on a brave face to continue working on an assignment for cosmetics firm ModelCo.

A source told The Sun: “The place was mostly full of loved-up couples. Dannii looked very lonely and miserable… She only left her suite when she was needed for work.”

Dannii Minogue told fans via Twitter: “Needing to retreat for a while. thank you for your ever loving support.”

Meanwhile, Kris Smith is believed to want to remain in Australia in order to stay close to Ethan.

A source told The Daily Telegraph: “Kris is and has been very much a hands-on dad and he wants to remain in Australia. He loves it here… He loves the weather, the lifestyle, the relaxed people.”

Yesterday, it was reported there had been trouble in paradise for a while as Kris Smith became close with several female models who allegedly played a part in the break-up.

Late last year, British Kris Smith was linked to Australian model Jennifer Hawkins after they modeled for the Myer department store together.

They were forced to insist that they were just “mates”, after Woman’s Day magazine reported that there was a “chemistry between the two of them”.

Photos also surfaced of him cosying up to Victoria’s Secret model Jessica Hart, as well as being linked to model Lauren Phillips.

Yet now Dannii Minogue has confirmed the split via Twitter, posting: “It brings me great sadness to tell you that Kris and I have separated… our son Ethan remains our number one priority.”

Meanwhile, Mancunian model Kris Smith wrote on his page: “Dannii and I have a deep mutual love and respect for each other and although things have not worked out we have a gorgeous son together that we both love and implore everyone to respect our privacy at this challenging time.”