澳洲人用的VWP每次最多停留90天。如果一年用好几次VWP来美国估计海关也会有麻烦。
-Your mother may just apply for B-2 visa to enter US, which allows her to stay in US for 6 months, and she may apply for extension for another 6 months. See:
http://www.ustraveldocs.com/au/au-niv-typeb1b2.asp
我在美国，我妈（在澳洲是澳籍）以后需要大概每年来待半年看我。这个怎么操作呢？她不想移民美国。
-No any visa for her to visit you for 6 months every year.
谢谢。
