DPP v Cormick is a split decision, majority saying strict liability applies but: The requirement that the behaviour towards the victim be voluntary and intentional is a significant element of the offence.
So an unintentional act, or involuntary act (eg sneezing, coughing) is not a breach.
The other judge disagreed, saying: I do not accept that the fault element of the offence created by that section is satisfied by proof that the accused intended merely the act that caused the consequence of family violence. I consider proof of the offence requires more than a general intention to commit the relevant act; it requires a specific intention to cause some form of family violence.
In other words, the Magistrate you get can rule either way. The facts should determine which was it goes - in Vic. Being in NSW, you need to apply the reasoning to NSW law. Can be argued either way.