After dealing with her husband, witnesses say the woman then drove up the road to the local surf club and drove her vehicle into the car owned by her husband's mistress.
"The wife found her hubby down the road with another girlfriend and she's rammed him in his car," a police source told Daily Mail Australia.
The 58-year-old woman was arrested and taken to Taree Police Station where she was released without charge pending further investigation.
The 57-year-old man and his 40-year-old lover gave details to police at the scene but weren't arrested.
This guy's probably crapping himself the police let her free - it's going to be one awkward (and possibly deadly) encounter at the dinner table.