If he's not married then it is legal
it is legal anywere.
you cannot marry your siblings, but you can marry your first cousin.
A marriage in Mexico by U.S. citizens is not recognized as legal in the U.S. One could marry in both Mexico and in the U.S. without worry of penalty. However, if they are U.S. citizens, only the U.S. marriage would be considered legal.
If you are married than he is now legal.
Contact your local health inspection or health protection office, they will be able to tell you the age requirements for your area as well as provide a list of inspected facilities near you.
The real question here is, did you register your divorce in Mexico with the US embassy or councilate? If you did then you may have just found yourself in a legal bind. If the marriage in Mexico was never registered in the US then you are probably in the clear. Check it out with a lawyer just to be on the safe side.
There is no such thing as a minimum payment. There is no requirement that anything be left to a sibling.
You will be an illegal alien while in Mexico. You would have to clarify your legal status before the Mexican Instituto Nacional de Migracion (National Migration Institute).
No. No one is allowed to be married to more than one person at a time in the US or Mexico.
i do belive that is legal. To plug your Ipod in and get songs from a sibling is legal. I have friends do it all the time. It NOT legal when you go on a website and get random free downloads and load them to Itunes.
Have him get a divorce. Don't marry a who is already married. It is going to be trouble for you.