She wasn't, since she was only 18 and one needed to have lived in the US for 5 years after the 14th birthday in order to do that. BUT, that only applies to births outside the US, and doesn't confer natural born status anyway. Since it's under statute law, it confers something like naturalization at birth, since Congress has no power to redefine a Constitutional term, like "natural born citizen" by passing a mere law. It would take a Constitutional amendment to do so.
The only way to be born outside the US and be natural born is for one or both parents to be serving the US in the military or diplomatic corps. Both parents must still be US citizens though. Otherwise NBC requires birth in the country to citizen parents.
Thus it really doesn't matter where BHO was born, since his father was visiting student from Kenya, and never was a US citizen, and thus he is not and cannot be a "natural born citizen".
Remember, NO birth document for BHO has been entered into evidence in any court. If it were, then it would become known, as a matter of law, that his father was BHO Sr, rather than as a matter of heresay.
Pinging tired_old_conservative & curiosity.
Don't want to confuse you two with facts, so you probably won't be interested in reading post #137.