Why Dhani won't be allowed in the House?

From the promos, we get to know that Dhani is not allowed to enter in the house after maariage. What do you think the reason behind this and Amber's 2nd marriage could be?

I got this off the star plus website
http://www.starplus.in/pages/index.php?s=Sajan%20Ghar%20Jana%20Hai&showid=31&pid=792

Sajan Ghar Jana Hai revolves around the story of a simple and beautiful girl named Dhaani; the only daughter of Rohini - a widow. Dhaani's mother always dreamt of getting her daughter married in a good household. Her dream comes true when Badri Narayan, an affluent, high caste Brahmin comes with a marriage proposal for his son Amber. But, all dreams do not come true. Tragedy strikes just when the marriage ceremonies are completed and it is time for Dhaani's Vidaai. Badri Narayan discovers that Dhaani belongs to schedule cast. Badri Narayan becomes livid and refuses to accept Dhaani as his daughter in law. Amber protests hold no ground in front of his unyielding father. He is left with no choice but to leave Dhaani behind. Dhaani's world comes crashing down. She is a married woman without her bridegroom by her side…
Both mother and daughter are left heartbroken and listless. Dhaani tries her best to make Amber's father agree to the marriage but all in vain. Fate takes another twist when Amber is forced to get married to another girl, Sarla who is as simple and nave as her name. Time flies until Dhaani decides to take the bold step of entering her husband's household in the disguise of a naukrani, all in an attempt to seek solace in following her patni dharam and serving her husband. . Dhaani and Sarla develop a special bond and Sarla magnanimously accepts Dhaani.
However, life is cruel to Dhaani yet again…Amber discovers that the naukrani is actually his love, his wife, the woman he always longed for. Soon, Amber and Dhaani's love blossoms during their clandestine meetings. However, Amber's father finds out and throws Dhaani out of the house. With her mother no more, Dhaani is left all alone in the world with no place to go to.
Where does Dhaani go?
Will she be able to go back to her husband?
Or will she find a life savior in someone else?
Watch Sajan Ghar Jana Hai to know what is in store for Dhaani, Amber and Sarla…

thank you so much i could understand the show at all GOD BLESS YOU

thanks.. but what does it mean, scheduled cast?=///

Thank you so much ShabnamSahebi.

thnx shabnam....u cleared all the confusion i had regarding the story :)

So she is considered married even though her husband won't accept her. I don't know why Amber does not leave his family and takes a stand against his father. I mean respecting your father is one thing but being a slave and ruining someone else's life is another.

Your welcome all, it was my pleasure. As for the schedule cast, i am not sure what that is, but i think it might have to do with Dhani's job or something like that, cause she makes doll right?

thanks....now it makes sense....

thx so much for the info..