You said natural born citizen was legally defined and Cornell says you're wrong.
She is a citizen through USC 8 Sec. 1401 naturalization, not through the 14th Amendment.
I honestly can’t understand how the first sentence in the 14th amendment can be so confusing to you or why you can’t understand the difference between naturalization and naturally born.
Should a new amendment be passed or a Supreme Court decision come about to clarify, the constitution stands as written.
But good luck to you.