answer for question one: no raj and rani had an arranged marriage through rani's dad liking him when he met him...and then the two of them i think only met once or twice for very short times and then they got engaged and married very quickly, becasue ranis dad was very rich but he went bankrupt and had to hurry the wedding so no one would know. On the other hand, raj is from a middle class family.
2. answer to that question is- Raj's mum and older brother got him married to rani for the money they thought cuz she was from a rich family she would bring a hefty dowry and money into the family, but she doesnt bring anything...so they hate her for it and try to split raj and rani...and get them divorce, thats where shilpa comes in...she is aarties cousin who was raj's friend and wanted to marry him, so they call shilpa to woo raj away from rani, so she can marry raj and he would divorce rani...but that doesnt happen as raj realises whats happening, and the differences between raj and rani close and shilpa says sorry realising her mistake and moves out of the scene....and eventually rani through her goodness etc, and honesty wins over the heart of surekha....etc...
hope that helps 😃