Maybe it varies from region to region? I dunno. My mate's missus has a daughter with the ex-boyfriend, and from what my mate tells me (so y'know, not empirical evidence or nothing) the ex is a bit of a religious nutter who is still obssessed with my mate's lady - and he has a bad habit of manipulating the kid to try and tell his ex that she's going to hell. Keeps taking her to church despite not being allowed to, doesn't keep up his end of the bargain, etc etc, one of the genuine bad eggs.

But the Family Court keeps giving him chance after chance. *shrug* All I know is that as a Dad, I'm terrified of going through it.

And yeah, I used to work for WINZ, and talking to dudes who were paying child support out of their benefit to their ex who had cheated and then moved in with the rich lawyer they'd been cheating with... man, that sucks so hard, I reckon if you cheat, you forfeit all claim to half the matrimonial property.