Father John Ignatius O'Callaghan (of the Melbourne archdiocese) took 
the traditional Catholic vow of a "celibate" priest. That is, he vowed 
never to get married. Instead, in the 1980s, he merely had a private 
relationship with a woman, who gave birth to Father O'Callaghan's two 
daughters. These girls have grown up into adulthood, knowing that they 
are the offspring of Father John O'Callaghan.
The private life of Fr John O' Callaghan is no secret among the Melbourne clergy of his generation. Several Melbourne priests have confirmed the O'Callaghan matter to Broken Rites. And a relative of O'Callaghan has spoken to Broken Rites, confirming the matter.
http://www.brokenrites.org.au/drupal/node/224
The private life of Fr John O' Callaghan is no secret among the Melbourne clergy of his generation. Several Melbourne priests have confirmed the O'Callaghan matter to Broken Rites. And a relative of O'Callaghan has spoken to Broken Rites, confirming the matter.
http://www.brokenrites.org.au/drupal/node/224