By Appointment Only (1933)

When a mother dies of heart failure in a doctor's office, a 50 year old physician, feeling somewhat guilty because he couldn't save her, takes an interest in her 14 year old young daughter, who displays dangerous Lolita tendencies, as well as mental challenges, and makes her his "ward", but his fiancée, who's obviously facing forty herself, doesn't particularly approve. After he returns from a three-year engagement in Europe, the doctor discovers that his ward is now four years older, but otherwise little changed, and finds himself falling for her all over again, although she's engaged to his fiancée's much younger brother.