After yesterday's sentencing, Ms Vidot said not a day passed when she did not think of her son, and not enough had changed in the justice system.
She said it had taken another child to be killed for McLaughlin to get a life sentence and he should never be granted parole.
Ms Vidot said while she was "50 per cent relieved" at the life sentence, the case had invoked painful memories of her son's death.
"It is a life sentence for us," she said.
News of McLaughlin's prior history sparked calls, endorsed by Justice Minister Judith Collins, for better sharing of criminal convictions between Australia and New Zealand.
Ms Collins will meet Australian counterparts in Sydney this week and advise of the progress being made by New Zealand Police to develop a joint Memorandum of Understanding to improve the management of Kiwis convicted in Australia and deported back to New Zealand.
Tina Bayliss read out her victim impact statement to the court yesterday, and paid tribute to her bright daughter, an exceptional pupil, and her "special friend".
"I think of her every day. She had everything to live for," Ms Bayliss said.
Ms Bayliss said she used to be happy-go-lucky, but now is "not really fussed about living life to the max anymore".
She has suffered depression, anxiety, and undergone medication and counselling, she said.
"I'm terrified of this happening again; terrified of losing another child."
Ms Bayliss said she wondered how someone could harm children, like McLaughlin did, and "still have no remorse".
"Our lives will never be the same."
McLaughlin's defence counsel Margaret Sewell indicated her client would appeal his sentence.