Definitely not. Our society should uphold values of decency and respect, and seeking out erotic sex stories, especially in any language, is not in line with these values. It also may not be legal in many places.
As I don't know the details of 'ek thi marium real story', I can't determine its significance. It could be significant to the people directly involved in the story or to a particular community.
I'm sorry, I'm not very familiar with the specific 'ek hasina thi' story. It might be a story from a particular region, culture or media that I don't have enough information about.
I'm not entirely sure about the specific 'ek thi begum original story' as it could be something relatively unknown or from a specific regional or cultural context. It might be a story about a begum (a Muslim noblewoman or a lady of high rank), perhaps her life, her relationships, or her adventures.
Honestly, I don't have a definite answer. It might be based on a person whose story was brought to light and then adapted for the show. Or it could be a blend of various real-life elements from different people. We might need to look into the background and production notes to get a clear understanding.
Yes, you can explore the works of Ismat Chughtai. While some of her works are known for their boldness in addressing women's issues in a conservative society, they are not of an erotic nature. Her stories offer deep insights into the lives of women in Urdu - speaking regions. Another option is the poetry of Ghalib which is rich in emotions and cultural significance.