Okay, imagine a really long time ago, in a place called the Ottoman Empire. This was a big kingdom ruled by a person called a Sultan. The Sultan had lots of wives and one of them was called Haseki Sultan.
Haseki Sultan was a very special wife, she was the favorite of the Sultan. She was very beautiful, very kind, and very smart. The Sultan loved her a lot and gave her lots of gifts and fancy clothes to wear.
Haseki Sultan also did some good things for the people. She helped to build schools and hospitals, and she also helped to make sure that people had enough food to eat. Everyone liked her because she was so nice and they were grateful for all the good things she did.
So, to sum up, Haseki Sultan was a very important lady in the Ottoman Empire. She was the favorite wife of the Sultan and did good things for the people.