The Tea Powder Revelation

Popatlal visits Jethalal's father to take care of him for a while. When Popatlal offers to make tea for the three of them, he realizes that they are out of tea powder. Jethalal's father asks them to call him on the phone and find out where it is. But Jethalal without realizing that his father is listening confesses of having forgotten to buy it. What effects will this revelation create?