According to local media reports the family had become suspicious of the maid, for undisclosed reasons, and installed a secret camera in the kitchen.
The camera captured two domestic staff going about their daily chores while one of them prepared a drink. She is seen stirring it and then heading away before the second maid walks over to the juice.
Before she gets there however she quickly pulls a beaker of what purportedly contains her own urine from her trousers.
She is then clearly seen topping up the drink with the liquid. The video concludes with the woman returning to carry on with her job. She can be seen preparing food in the background.