In a preview for an upcoming episode, the 33-year-old mum is seen weeping in the car screaming "something isn't right" as she covers the camera with a bag of food from McDonald's.
Sara is then seen storming off set saying: "I hate it. It is ugly." Her husband and Block partner Hayden appears to say in the background, 'I'll just leave the show. You can do what you want.'
The tantrum comes after the couple finally won a room reveal on Sunday night, after three weeks of coming in last place.