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While it's true that you are normally permitted to enter the US for up to 6 months on a B1/B2 visa, the actual number of days you are permitted to stay for a given visit is what's recorded on your electronic i94 record, by the Immigration Officer at the Port of Entry. They would ask you how long you are visiting for and then enter the number of days based on that on the system. If she wants she can check how long she was admitted for during her last visit by checking her i94 record online. The website to do this is given below:rg808253 wrote:it is very confusing that what is the maximum stay on visit visa is it 6 months or 180 days??