Visitor Visa question/clarification

My Mom’ got approved for 10 year visitor Visa and she landed in US about a week ago. She got stamped to stay until May 5, 2017 but she wants to go back to India in Feb, 2017 and come back again to US in March 2017, Is there a problem in travelling in between? She need to back for stamping again? Please can you clarify


She doesnt need to go for stamping for the next 10 years from the date of her visa stamping.

But if she is going and coming back frequently from US, its not good. If she visits US with around 6 months gap, that would be a good and safe plan.