If you are a U.S. Citizen, you can file an I-130 for her and do the IR-5 process to bring her to the U.S. Here is a link:
The process can take about a year. If there is some urgency, you can try to expedite the process. Here is a link:
If she gets or has a B-2 tourist visa, she can enter the U.S. and later apply for Adjustment of Status, but this is dangerous because if they figure out what she intends to do at the port of entry, one of three things could happen:
a) They will allow her to withdraw her request to enter the U.S. and she can go home, no penalty.
b) They will not allow her to withdraw her request to enter the U.S. and will order her excluded. This has a 5 year penalty that she cannot come back unless she gets a very hard to get waiver.
c) They will not allow her to withdraw her request to enter the U.S. and they catch her in a lie and they exclude her with a permanent bar due to fraud and/or misrepresentation and with that charge she cannot come back unless she gets a very hard to get waiver.
So because of that risk, I cannot recommend that she try to enter on a B-2 tourist visa.
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