Complex sentence: Joan has a further problem when her impatient fiancee, a Kansas City banker, not only wishes her to return home in failure to become his meek housewife, but arrives in New York to sabotage her aspiring career.
Split into simpler sentences: Joan has a further problem when her impatient fiancee, a Kansas City banker orders her to return home in failure to become his meek housewife. When she carries on in her plans he arrives in New York to sabotage her aspiring career.