Crabtree was found not guilty in May of the murder and attempted murder of her son, Jonathan, 26, at the family's Gold Coast home in 2017. She had also faced allegations of murdering her daughter, Erin, 18, in 2012, but that charge was dropped during a review in June.
The fraud charges relate to separate incidents. Crabtree pleaded guilty to two counts of obtaining financial advantage by deception for continuing to accept carer payments in late 2017 for another daughter, Tara, when they no longer lived together. She also pleaded guilty to one count of fraud of at least $30,000 for accepting assistance payments from a disability organisation without disclosing that she had moved interstate.
When asked if she had anything further to say after entering her guilty pleas, Crabtree replied, "No." Sentencing submissions are yet to be heard.