No, there is no country on Earth that allows parent and child to marry.
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The most traditional method by which a father legitimizes his son is to marry the son's mother. It is also possible to formally recognize the son as his own, even without marrying the son's mother.
That it is predicted that their son will kill his father and marry his mother.
Your mother's sister's son is your first cousin. In Canada and the United States, you are not allowed to marry your mother, your sibling or your child. However about half the jurisdictions in the US permit first cousins to marry.
He did but they divorced about a month later.
Yes.
That his son Oedipus would unknowingly kill him and marry his mother Jocasta.
If you are a woman, and your grandmother's brother is a great deal younger than your grandmother, or a little younger and had a son very late in life, then you could marry him legally in many, but not all, parts of the world. You and he are first cousins, once removed.
In most cultures and societies, marriages between a son and his mother are considered incestuous and are not legally or morally acceptable. Such relationships are widely condemned and prohibited due to genetic and social implications.
His son Oedipus would kill him and marry Laius's wife and Oedipus's mother Jocasta.
If they have the required license, yes. If you meant can a mother marry her son then obviously, no.
A oracle predicted that thier son would kill Laius his father and marry Iocaste his mother.