I think it's good prerna is the one that didn't throw the party. It has to be realistic. Right now she is slowly accepting her husband good nature. They are one month newly wed. She went from hating him to not hating him anymore. Prena throwing the party will make no sense. But that doesn't mean she won't be friendly throughout the party.
No love angle....just as a gesture of thanks for doing everything for her mom...one month wedding mein this much is reasonable I feel