When Oedipus grew up he somehow heard about the curse that revolved around him. Still believing that the king of Corinth was his Birth father, he decided to leave in order to protect his parents from the curse.
I must leave, I must protect them.
On the way to Thebes Oedipus kills an old man who got on his nerves!
Thats what you get!
Oedipus arrives in Thebes, Only to find the Sphinx spreading destruction. To save Thebes he goes the Sphinx and solves its riddle
What is that which in the morning goeth upon four feet; upon two feet in the afternoon; and in the Evening upon three?
Out of Gratitude Jocasta now a widow marries Oedipus
15 years later
Oedipus and Jocasta find out about the terrible sin that they have comitted and decide to end their lives promptly.