[silverleaf]

the US mama had to reside in the USA for 5 years after the age of 16 to confer US citizenship on her child born abroad with a foreign father

Stanley was 18

[ASOC]

From the US State Dept A child born (overseas) whose parents are legally married and one of the parents was a U.S. citizen at the time of the child's birth acquires U.S. citizenship at birth if the U.S. citizen parent was physically present in the United States for five full years before the child was born and two of those five years were after the parent's 14th birthday.