We haven't yet established that Charles Saxe's wife was a Susan Hegarty.
1900 Census- Kings Co.
Susan Sexe, July 1864, Ireland, married, m.16 yrs, 6 ch./5 liv. [Charles not listed]
Mamie Sexe, Aug.1886, salesladay dry good
Charles Sexe, May 1887
Florence Sexe, Aug.1889
Paul Sexe, Aug.1891
Agnes Sexe, Aug.1895