Jack London 
The Little Lady of the Big House 

This 1915 novel features a love triangle between a rancher, Dick Forrest, his wife, Paula, and her lover, Evan Graham. All characters can be traced back to London and his friends and family. London called the novel "all sex from start to finish—in which no sexual adventure is actually achieved or comes within a million miles of being achieved, and in which, nevertheless, is all the guts of sex…."