Hello, I filed my wife's i130 and did the best I could. Upon filing out her DS-260, I was confused why it did not add our son from her previous marriage (he is 13). NVC informed me that he was an immediate relative and needed his own i130. I've read many different confusing advice related to this and seems that he may be able to join her green card but is not eligible for follow-to-join. Anyone can explain what we need to do? File a 2nd i-130 for our son and wait another year to get out of USCIS? Thank you in advance for your advice.