Alauddin married his cousin, the daughter of Jalaluddin
One of the interesting facts about Alauddin Khilji is that he married his cousin, the daughter of Jalaluddin - Malika-I-Jahan. Her mother, Malika-i-Jahan, was Jalaluddin's principal spouse. She was a very ambitious and haughty woman who had a lot of power over the Sultan. However, the couple was not happy. Malika was well known for her arrogance and took pride in being the Sultan's daughter. That's one of the reasons why Alauddin neglected her and decided to get married to his second wife, Mahru. As a result, it worsened his relationship with Malika.
Alauddin Khilji broke up with the princess after she made an effort to rule him and openly displayed resentment and hatred towards Mahru, his second wife. Malika-i-Jahan once attacked Mahru while he and Alauddin were in a garden together. Alauddin attacked her after losing his temper. Jalaluddin was informed of the occurrence, but the Sultan took no action against Alauddin. He eventually had four marriages.
Alauddin was also not satisfied with his mother-in-law, who convinced Jalaluddin that Alauddin wanted to establish an independent kingdom in a distant region of the nation. Alauddin didn't file a complaint against his wife because he was afraid of her influence over the Sultan.