Complex sentence: In the letter she mentions about ruling the empire and getting on throne while disposing off Suleymen.Suleymen believes that Mustafa has betrayed him when he sees Mustafa's seal on the letter.
Split into simpler sentences: In the letter she mentions about ruling the empire and getting on throne while disposing off Suleiman. Suleiman believes that Mustafa has betrayed him when he sees Mustafa's seal on the letter.