dadisa is doing it for sumitra's sake(?) but strangely she is not caring anymore for Jagya's happiness. And anandi is doing it because she is suffering from short term memory loss. Both are to be blamed for what they are doing knowingly without strongly protesting.
Sumitra knows why she is doing that. Just to get rid off ganga. Not that she is very fond of sanchi. But sanchi is the weapon with which ganga can be vanquished, according to sumitra.
Jagya knows that something is wrong but he just cant pinpoint to what is wrong.
He is in a spot because he cant say no to his family when it comes to his marriage. He thinks that his family has done him a great favour by accepting him back and thus he owes something to his family. A confused Jagya as usual.
Ganga knows everything and she knows sanchi will not be a suitable wife for Jagya. More than her losing Jagya, she is more worried about Jagya's future happiness with a girl like sanchi as her own love is selfless.