Barnaby Joyce not sure if he's the dad

Former Australian Deputy Prime Minister Barnaby Joyce claims the child at the centre of his infidelity scandal may not be his.

Mr Joyce is slamming the reporting of his relationship with staffer Vikki Campion, insisting he was in Europe and she was in North Queensland around the time she fell pregnant.

He called the unborn baby's paternity a "grey area", but would raise it as his own, the Sydney Morning Herald reported.

"It's mine, on the record, there it is. And can I say, even if it wasn't, I wouldn't care, I'd still go through this, I'd still love him," Mr Joyce reportedly said.

He doesn't plan to take a paternity test to find out once and for all.

Mr Joyce was forced to resign as Deputy Prime Minister in February over the scandal, the second he faced inside of a year. He was previously ruled ineligible for election to the Australian Parliament before he reneged his duel New Zealand citizenship.

Australia's Prime Minister Malcolm Turnbull imposed a ban on sex between ministers and staffers in the wake of the scandal around Mr Joyce.