Judith Collins says parents of the kids allegedly sexually assaulted at a Labour Party youth event should have been told right away.
"I'd actually rip their throats out for doing that, if it was my kid, I really would. Obviously not physically, but you might as well. That's what I'd want to do."
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Four 16-year-olds were reportedly attacked and harassed by a 20-year-old man at a Young Labour summer camp in Waihi last month. Labour didn't inform the teenagers' parents.
"It's not a good situation. We're not happy about it. I think we let these young people down," Mr Twyford told host Duncan Garner.
Ms Collins, appearing alongside Mr Twyford, said there should never have been any question about what parents would have wanted.
The Housing Minister admitted if it was one of his own children, he'd liked to have been told right away.
Ms Collins, who recently was appointed as National’s Housing Minister, expressed her disappointment in the Prime Minister.
The National MP pointed out several incidents where Jacinda Ardern was one of the first to call out inappropriate behaviour to the public.
“Well about have look in their own home?” she asked.
Labour has organised an independent inquiry into what happened in Waihi, and its response.
"We recognised that the situation was completely unsatisfactory," said Mr Twyford.
"Those members of the youth wing of the Labour Party should never have been put in a situation where they were organising events where alcohol was available where there were under-18s there. Putting them in that situation was unfair. The party let them down."
Young Labour won't be allowed to organise any parties anymore, he said.
No one in the Labour Party leadership has lost their jobs.
Watch the full interview with Judith Collins and Phil Twyford above.
The AM Show with Duncan Garner, Amanda Gillies and Mark Richardson, weekdays 6-9am on RadioLIVE and streaming live to the rova app on Android and iPhone.