Actually I now remember reading in a magazine a collection of classic desi love stories. The collection included the ones most people are familiar with such as Laila/Majnoo, Heer/Ranjha, Soni/Mahiwal......and there was also the story about a cousin romance where the heroine was named Saiqa.
So, I'm guessing that the drama, Saiqa, is based on the classic story/tale of a cousin romance.