Answer:
Jocasta is Oedipus' wife, aka the Queen of Thebes. She is also Oedipus' mom. Creon and Jocasta are siblings.
Jocasta's main opinion of prophets, like Teiresias, is that they aren't true. She base her opinion on the fact that Laius went to a prophet and he told him that their son would kill Laius. Since she believes her son to be dead and her husband to have been murdered by a band of thieves, this seemingly disproves the prophecy that said Laius would die by his son's hand.
Jocasta does not believe in the divine prophecy and tells Oedipus not to trust in the words of the oracle. She is less inclined to believe in the prophecy, first because she says that whatever happens is not the fulfillment of fate, but occurs by chance through a series of events that are unforeseen.