I hope you've seen the part where Anu and Chet are married. After that they are unable to celebrate Suhag raat because Maya paid the pundit to tell Chetanya if they do not wait for six months, Anu will die. At her susral, we find that Chetanya's brother hates him and never really considered him his brother, and Padmini (sister-in-law) hates them both as well. She hates the fact that Anu is getting all the rights of the big bahu, and Shardaji takes the keys from her and give them to Anu, and the hatred begins. Also Shardaji gives Chet he's father's position in the company, which anger Inder. Vikram is going bankrupt because his storage caught on fire once Anu left his house. Maya, Nani, Ridhma go to stay a few days at Anu's house to see if they were successful in making her unhappy. But they are suprised to see that she is living like a queen, and is happy. They team up with Padmini, and leave Ridhma behind to make Anu's life a living hell. It seems Chet loved a different women (Aditi) in his past, who died, but seems to be hauting him. Inder is lying to his mother about building a orphanage, but Shardaji findout about his lies.
This is where the drama is at in the US. For more detail I recommend reading the updates.