Whatever happened to Baby Dorothy?

A few years ago, someone told me that if you're stuck on a particular ancestor's story, you should write down everything you know. I did it for my great-grandfather, Joseph Ortmann, and now I'd like to try it for my paternal grandmother, Mary/Marie/Maria/May/Mae Siegler Ortman (yes, she did use all those variations of her name over her lifetime). Mary A. Siegler was born on March 23,1895, in Woodhaven, New York; her parents were George Siegler, a barber, and the former Matilda Hug. In May of 1889, a brother, Nicholas, was born, but unfortunately he lived only a few months, dying in August, 1889. After many years passed, George and Matilda had another child, Dorothy G. Siegler, in 1912, making a more than 16-year difference between the two sisters (though I remember clearly my grandmother telling me many times it was a 12-year difference -- don't we all shave off a year or two where we can?). In 1916, when Mary was 20, she married a bank clerk named Frank Sang...