Person I know is being dodgy with Centrelink (welfare)

This lady I know of which I don’t like has been claiming single parenting payments for 5 years even though two years ago she had a child with the same dad as the first child yet Centrelink (welfare) have not clicked onto that anyway my question is should I report her? Or is it none of my business and should just let her keep stealing from the government some how I don’t think they will ever click onto it them selves. This lady needs to learn the value of money and earn it like the rest of us humans.