I agree Ishwari laid out her trap very well... This woman i tell you.. she is very intelligent and knows exactly how to work her way..with out the other person realizing what is she doing to her.
She did the same thing, she emotionally manipulated Sona into saying that She does the pooja for family's welfare -- she knows Sona will try to copy everything she does.
She did not tell the important rule until Sona already committed to doing the pooja for family's good.. Then she tells her she has to abstain etc...
Sona is trapped now... A sensible Sona that I knew would have said " I will check with Dev if he is ok with me doing this vrat" ... I am sure DEV would have said NO.
But instead she committed trying to win the Most wonderful Daughter in law pageant (which unfortunately she can never win) and now is going to face the wrath of Dev
Dev expressed the thoughts of viewers ( trying to win the best DIL pageant ... she is not even trying to be a decent wife)... I am positive CVs are doing this purposefully and hoping Sona will come out this illusion asap...