nona, chill o tranquiloooo! It is not the US's responsibility to enforce Argentine law, and it would be incredibly inappropriate to do that. I would have already gotten in trouble if that was the case at the US Embassy, cough, cough. (I am not a total beluda disclaimer: But to be fair to my fab Arg bros and sisters, I am not claiming a callous disrespect of your laws. My legal visa here for a university degree program is in tranmite thanks to the stupidly slow FBI antecedentes process. And while they are not Migraciones, I am acting in accordance the advice of the International Office of the school. Though they had no idea the FBI file would take this long to get. Thank you, thank you for not criminalizing my actions in the process--a measure of respect my country would not return. So I really appreciate it!!)
The only problem that it could remotely cause you might be if they the US immigration people want to grill you on your law abiding-ness. But if you have all the documentation, maybe some letters from family, I sure hope they won't give you heck!
Are you all planning on getting married within 90 days or do you know about a loophole I do not? I read on some pdf document about the visa that you have to make a sworn statement that you will get married in 90 days. dang! I just want to take my fiance to visit family first and not have a flash wedding, but they told me that was a tourist visa. blah!