May be your line of thinking is right. The writer wants to lead the story to a point where Nani and Pushkar will trip. He has already warned Pushkar, that if he comes to know later, that he knew whose Baby it was, he would come hard on him.
That is why, he is always shown cautious and courteous.
In the past, Siddarth, boy friend of Tapasya too was led on, but in the end landed in jail. Nani and Pushkar have been given many breaks, perhaps because she always calls on Ram's name, that he has patience with her, but he too can not go on forever. Even he had to end his vanvas after 14 years.