Conversation so far:
Who did John F. Kennedy Jr.'s mom get married to?
Jacqueline Kennedy married Greek shipping tycoon Aristotle Onassis.
When did John F. Kennedy Jr.'s mom get remarried?
In 1968, Jacqueline Kennedy married Aristotle Onassis.

Question: How did John react to the new marriage?
Self-contained rewrite: How did John F. Kennedy Jr. react to his mother's new marriage?