Andrei

Thank you, Jozef and Fabian. That's what I had in mind- this plan was
so simple that it should be used by everyone.

However, does it make any sence to apply for I-130 before my wife's
B-2 will be expired here or it does not worth it and I should wait for
USC first? I have heard that if one applied for I-130 as GC holder and
then become USC the "waiting period" is automatically waived and if
I-130 is already in the system... maybe getting a GC for my wife will
take less time that starting from scratch as USC?

The other question is could it be a problem if my wife stay in the US
until I get USC, i.e. will overstay her B-2 visa, and then I will
petition for her as USC? In other words, could INS deny a greencard
or create any other problems for USC wife if she overstayed her visa?
Or, if she will departure and I petition for her as USC, could she be
denied entry?

Thanks,

Andrei