Additionally, He would have to process his immigration paperwork in Mexico and he will have to apply for an I-212 waiver. The waiver would have to be supported by documentation to show extreme hardship to his United States Citizen or lawful permanent resident spouse or child. I recommend you speak to an immigration attorney to help you through the process.
Yes, You would first have to file an I-130 for him. Then he would have to consular processin Mexico and he would have to apply for an I-212 waiver. The waiver would have to be supported by a lot of documentation to show extreme hardship to you and your son. I recommend you speak to an immigration attorney to help you through the process.
I believe the question refers to immigration proceedings in the US. However, there is a bigger question to consider. How did she initially get a work permit? If she has been in the US unlawfully for more than 180 days and then leaves, she is subject to an unlawful presence bar and may need a waiver to reenter the USA. I would consult an attorney.
I highly recommend speaking with an immigration lawyer, not only for the bond issue but what type of relief, if any, your husband is eligible for.
If your boyfriend does come into the USA on a K-1 visa, you both must marry within 90 days of his entry into the US. If you would like more information on K-1 visas you can also check out the US State Department website at http://travel.state.gov/visa/immigrants/types/types_2994.html#14