Conversation so far:
What is known about Eugene O'Neill's family life?
Eugene O'Neill was married to Kathleen Jenkins from October 2, 1909 to 1912, during which time they had one son, Eugene O'Neill, Jr..
How was Eugene O'Neill's married life?
O'Neill's first marriage ended in divorce.
What more is known of Eugene O'Neill's family life besides his marriage to Kathleen Jenkins and son Eugene O'Neill, Jr.?
Eugene O'Neill also had distant relationships with his sons.

Question: How was his marriage to Agnes?
Self-contained rewrite: How was Eugene O'Neill's marriage to Agnes Boulton?