Your mother in law can go to the US embassy in her country and apply for tourist visa Form DS -156 There is high visa refusal rate in many consulates for these kinds of requests due to the suspicion that she is not an intending immigrant; that she is coming to stay for a long time (beyond 6 months) to become a full time baby sitter for your family. Any evidence that she intends to return to her country after a temporary stay must be provided Also a letter of invitation from you indicating your financial ability to provide her food, lodging and other necessaries so will not engage in unauthorized employment or go on welfare must be provided. Importantly though, unless she is able to provide evidence that she has strong ties in her own country that will assure her return within the time allotted for the B-2 visa, her case may not be approved.
Answered on Oct 23rd, 2013 at 4:27 PM