I honestly dont think Phooli or anyone else really foresaw that things would go to this extent ... that Jagya would show up, ALREADY MARRIED, without consulting anyone and then bring his second wife to the haveli.
Everyone - whether phooli or lal singh or anyone else who knew must have thought of it as some low-lying college attraction which would one day fizzle out after J completed his medical studies ... or that gauri would refuse to marry him once she learned he was already married... and that if something like this happened, it was probably expected that jagya himself would confess to anandi and the family ... so they didnt want to get involved in revealing something which might cause problems between a and j. or between j and the family. There may have still been some thinking on the parts of everyone that even if J confessed, his family or his dadisa would never allow j to split from a.
In fact, they also might have thought that even if it proceeds further, a day will come when gauri's parents want to meet this guy and find out and meet his parents -- and at that time the GAGA relationship may collapse. Who was to know that her parents would give her such an enthusiastic go ahead to marry a married man? Weird marriage.
They didnt anticipate that Jagya and Gauri would railroad this marriage through in a court and present it as a done deal to everyone.
Things happened in a way that no one anticipated.