The 40-year-old, who was expected to return to the hit show "X Factor" but pulled out at the last minute, is said to have taken the step because she wants to concentrate on her relationship with Smith, reported Daily Mail.
"Dannii and Kris are working on the relationship in the hope of getting back together. They have both acknowledged they still love each other but know they have a lot of work to do before being one happy family again. Dannii is committed to putting her family first. Since becoming a mum her priorities have changed," a source said.
Dannii, who has a son named, Ethan Edward Minogue Smith, with Smith, had confirmed speculation they had split on her Twitter page on April 4.
Dannii and Kris met on holiday in Ibiza in August 2008 where the male model was celebrating his 30th birthday.