QLD Abandonment Clause on Farm?

My wife left at Christmas has gone and rented her own place. She has own bank accounts etc.
She left me to pay our mortgage for our farm and has not and will not contribute. I pay $585 week.

I have always paid for everything before and since she left. She tells me she might come back one day and to keep the farm payments up for our kids as it's where they grew up. Just wondering would the abandonment clause ever come into play and if so, what's the time frame?

Thanks,