b2 visa for unmarried friend

my 48 year unmaried friend has applied for b2 visa to visit her brother who is in US. he is going to sponsor the trip. she owns flat (own place to stay) has her small business ( with well settled set up here) of making mural paintins,landscape paintings,immitation jewellery and also helps her sister on farm as clerk .she is currently staying with her 78 yr old mother and both are financiallly independent .what are her chances of getting b2 visa?

I dont see an issue. She should be ready to prove, she is indeed going to visit her brother and on tourism. She will need to show that she has strong connections back in India and will indeed return back.