It is considered polite for the host to try and convince you to eat more
In India, there is an age-old proverb that goes, "Atithi devo bhav," which literally translates to "The Guest is God." It's possible that your host will try to get you to eat more and more until you are completely full. Insisting that you sample a dish or offering special dishes in excess is seen as a display of affection from your host toward you, the guest.
Keep in mind that it is not rude to decline an invitation, even if you are feeling somewhat overwhelmed and unable to say "no." In spite of the fact that Indian hostesses may come off as assertive, you can rest assured that they are incredibly accommodating and would comprehend if you do not want any more food.