Sorry. This story is completely bogus.
I have it from the wombat that it was entirely consensual.
In fact, Mr. Cradock has done nothing to explain why police found the roll of his Kiwi dollars in the wombat's pouch. Sounds like a ruse so his wife doesn't think he's been out whoring the streets of Christchurch, paying for a habit of cheap, illicit wombat sex.