Oedipus is trying to get the truth out of the Shepard about who he is and the Shepard is resisting, saying it is too terrible to say although Oedipus is suspicious of his true lineage he doesn't know the full story

In Thor, Loki began to be suspicious that Odin wasn't his father and confronts him

Tell me the truth before I beat you up, i want to know who my family is even if they are slaves!



 Oh no, I'm about to say it!

The truth is, Jocasta is your mother and she gave you to me when you where a child to kill because she was scared of the prophecies 

OMG this is crazy, I am cursed in everything I do its so unfair, where is Jocasta?

He finds out the truth- that he married his mom and killed his dad like in the prophecy

Loki eventually finds out that Odin adopted him as a child to save him from the ice giants and feels betrayed

Oedipus finds Jocasta dead, she killed herself once he found out because it was too much to bear

Loki's mother also died, but from an attacker and he is devastated

oh, and you killed your dad too

NOOOOOOOOOOO