You should consult with an experienced immigration attorney to fashion alternative non-immigrant visa options for your son to change to from his current F-1 visas which will allow him to remain in the US legally until such a time when his F2 visa will become current, also note that if you become a US citizen, his F2 petition is automatically converted to F1 [adult unmarried son/ daughter of a US citizen] which will hopefully reduce the processing time of his petition further.
Answered on Apr 29th, 2014 at 7:20 AM