Joffrey's mother, Cersei, orders for Joffrey to seize the throne once the current king dies because of their family's claim to the throne.
Yes, you will; you are destined for the throne and you will do as I say!
Joffrey, I am your mother and you will fulfill my words for you. You will be king! That throne shall be no one else's, but yours.
What?! I do not understand. I cannot attain the throne. I am no worthy descendant of royalty.
Cersei devises a plan for Joffrey to follow in order for him to seize the throne as soon as possible. Cersei initiates her scheme by ordering an arranged marriage between Joffrey and Sansa Stark.
I love you.
I love you and will stay by your side for better and worse.
That same night, King Robert Baratheon suffers from a sudden illness and dies in his bedroom.
Oh no; I do not feel very well.
Ned Stark walks in and finds out that Cersei is having an affair with her twin brother.
That will not be a problem.
We must keep this affair a secret. If they find out, they will behead us.
Oh dear, Cersei is having an affair with her brother!
Before Ned Stark has the chance to inform anyone about Cersei's affair with her brother, Cersei orders for Joffrey to immediately behead him. However, Joffrey is conflicted between obeying his mother and staying loyal to the Starks.
Ned Stark is no good. Behead him before your place on the throne is stolen!
Behead him?! Is it really necessary?! I cannot do that! He is my brother-in-law.