Andrea Windleborn did not hesitate when she saw her son being attacked by two men with hammers - she waded in to try and save him.
Carl McGahan, 22, disturbed the two offenders attempting to break into a shed at their home in the Coromandel town of Waihi, on Monday night.
Ms Windleborn, 44, told the Waikato Times she acted on instinct when she ran between the men to help her son.
"I saw these two guys attacking him. I went flying out to protect him even though they were bigger than me.'' Ms Windleborn said.
She stood between the men and yelled at them to stop, but it did not stop one of them hitting her with a hammer.