Complex sentence: Jigyasa (Jai's evil sister) doesn't want the Walia family to be humiliated, so she forces Bani to take Pia's place, and Jai ends up marrying Bani.
Split into simpler sentences: Jigyasa (Jai's evil sister) doesn't want the Walia family to be humiliated. So she forces Bani to take Pia's place, and Jai ends up marrying Bani.