Stewart is charged with having sexual intercourse, involving digital penetration, with the girl without her consent on the evening of March 6, 2009 at North Manly.
The 24-year-old fullback also is charged with assault with an act of indecency, namely that he "forced his tongue into her mouth".
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The father, who cannot be named as it would identify his daughter, told the court his daughter had been outside smoking when she ran into the kitchen upset and shaking.
At first she could not get the words out but then told him a man had touched her, putting his finger in her vagina, and that he was nearby and wearing a suit.
The father said he went outside and saw a man standing under a tree and when he asked his daughter "is that him?" she replied "please dad, please dad".
The man then called out "I didn't touch her bro" and repeatedly denied the claim when the father put it to him.
On a scale of 10 to zero - from drunkenness to sobriety - the father said the man was very drunk and rated him at eight.
He said the man repeatedly said "you know who I am".
The father said he called out to neighbours to call the police and after the man grabbed him by his shirt, the father elbowed him and tried to calm him down.
"I just kept an eye on him making sure he didn't belt me before the police arrived," the father said.
The father told the magistrate he had a criminal record for fraud matters and had served time in jail for the offences, but he told Stewart's barrister Clive Steirn SC "that is who I was, not how I am now".
The hearing is continuing before deputy chief magistrate Paul Cloran.
