Rosie Batty has broken down in court saying she felt she was being questioned over every decision she made about her murdered son.

After spending years trying to protect her son from his father, Rosie Batty no longer wants to have to defend the decisions she made in the lead-up to Luke’s murder.

“Why am I having to defend the decisions I made about our son?” a distressed and yelling Ms Batty told the inquest into Luke’s death.

“Isn’t it unfair that I’m having to be the one to answer for all this?

“Did I ever think Luke would get smacked over the head with a cricket bat and stabbed to death? Of course I didn’t.

“So don’t ask me any more about what I did and the risk I thought there was, because there was an ongoing, never-ending consideration of Luke’s safety, except he got killed, he got killed on a day everyone thought he was fine.”

Under the strain of a second day giving evidence, a tearful Ms Batty said she had never heard of the term filicide, never knew something like that could happen, until her ex-partner killed their son.

“I made the best decisions I could at the time,” Ms Batty said on Tuesday.

“No one loved my son more than me.”

Greg Anderson hit the 11-year-old with a cricket bat and attacked him with a knife while they played together in the nets following cricket training in Tyabb in February.

Ms Batty considered calling police when he turned up at the cricket oval but decided not to, as previous attempts to have him arrested there proved traumatic and unpredictable.

Anderson had defied a court order and breached his bail conditions by turning up at the oval in April 2013, but Ms Batty says police told her they could not arrest him because they did not have a warrant.

Ms Batty said she had given the police Anderson’s address and wondered why they hadn’t acted on outstanding warrants and arrested him.

She said she thought: “Why haven’t you arrested him, I’ve given you his bloody address.

“The man was never important enough, he wasn’t f***king dangerous enough, he wasn’t bad enough until now, now he’s the worst.”

She said she detected nothing sinister in Anderson on the day he attacked Luke.

Shortly before he was killed, Luke had run up to her to ask: “Mum, is it OK if I have a bit more time with dad because I haven’t seen him for a while?”

Ms Batty said she was often left exasperated by the actions of police and social workers.

“I wanted support. I wanted other people to step in to make some decisions so it wasn’t just me facing Greg.

“The only suggestion they have is to have counselling.

“No one spoke to Greg. If he stopped being violent, I wouldn’t need counselling.

“Why are they called child protection if they’re not someone you can go to to say how can I protect my child?”

Ms Batty said she feared Anderson may have been contemplating killing Luke in a murder-suicide but did not believe it would ever happen in a public place.

“It couldn’t happen at the Tyabb oval, but it bloody did.”

* Readers seeking support and information about suicide prevention can contact Lifeline on 13 11 14 or Suicide Call Back Service 1300 659 467.