Hey Saamya,good question.Well I think the people in the house never considered the marriage to be real except for our rockstar JK who had her own selfish reasons.For them or at least PB it was just a ritual in name which paved way way for Gulaal to stay in the house.That's why she was never asked to perform it.PB wanted to put a stop to the gossip mongers who were casting aspersions on Gulaal's character.I think that's why she asks Gulaal to keep the vrat.In order to make Gulaal agree to this she says that it would be beneficial to Kesar cause she knows that Gulaal would do anything that would be in Kesar'sbest interests.This is what I felt about the scene.
yes, i do feel the major reason was to shut the latest gossips...but then they did shiv pooja also together..so i was wondering why PB had to push so hard to make VAT SAvtri look a very very imp ritual...i mean why she felt Gulaal might not like it...when infact Gulaal has done many rituals before...
i can now understand why gullu was reluctant but still not able to fathom why PB was so doubtful