Semans says she wrote that line into the narrative after she had told a lot of people, including her parents, about the spot.
Semans says she wrote the line about the deserted island, only after telling several others. 
mnli hypothesis: Semans says she wrote the line about the deserted island, only after telling several others.  premise: Semans says she wrote that line into the narrative after she had told a lot of people, including her parents, about the spot.