Nope. If the child has been adopted, all parental rights were terminated. HOWEVER... where were the rights terminated, and where did the adoption take place? She may have grounds to contest if the adoption of an American child didn't take place on US soil.What is the law on visiting rights for a biological parent of an adopted american child living overseas?
Depends on the country the child is living in. Their laws apply, not US laws.
because she was adopted by the father's sister(or aunt) I would hope that the aunt would do the right thing and allow some form of visitation to the mother. but because she has been adopted, the aunt really has no obligation to the mother.