No.
No, if they are married they have equal custody.
No.
He killed his father and married his mother. (Unwittingly, but still)
Yes.
He can still gain custody as the presumptive father.
No. If you're married, you're emancipated, and you're on your own.
no
When married you are emancipated so no.
if you are emancipated you no longer need parent's permission for anything
The mother is 83 and still alive
she is his aunt and not they cant get married. Since you still share blood with her because you have the same father, your son is related to your sister.
If the marriage was legal when it was conducted, yes, it is still legal. And once you are married, in many states you are automatically considered emancipated.