Question:
O'Neill was born in a hotel, the Barrett House, at Broadway and 43rd Street, on what was then Longacre Square (now Times Square). A commemorative plaque was first dedicated there in 1957. The site is now occupied by 1500 Broadway, which houses offices, retail, and ABC Studios. He was the son of Irish immigrant actor James O'Neill and Mary Ellen Quinlan, who was also of Irish descent.
O'Neill was married to Kathleen Jenkins from October 2, 1909 to 1912, during which time they had one son, Eugene O'Neill, Jr. (1910-1950). In 1917, O'Neill met Agnes Boulton, a successful writer of commercial fiction, and they married on April 12, 1918. They lived in a home owned by her parents in Point Pleasant, New Jersey, after their marriage. The years of their marriage--during which the couple lived in Connecticut and Bermuda and had two children, Shane and Oona--are described vividly in her 1958 memoir Part of a Long Story. They divorced in 1929, after O'Neill abandoned Boulton and the children for the actress Carlotta Monterey (born San Francisco, California, December 28, 1888; died Westwood, New Jersey, November 18, 1970). O'Neill and Carlotta married less than a month after he officially divorced his previous wife. In 1929, O'Neill and Monterey moved to the Loire Valley in central France, where they lived in the Chateau du Plessis in Saint-Antoine-du-Rocher, Indre-et-Loire. During the early 1930s they returned to the United States and lived in Sea Island, Georgia, at a house called Casa Genotta. He moved to Danville, California in 1937 and lived there until 1944. His house there, Tao House, is today the Eugene O'Neill National Historic Site. In their first years together, Monterey organized O'Neill's life, enabling him to devote himself to writing. She later became addicted to potassium bromide, and the marriage deteriorated, resulting in a number of separations, although they never divorced. In 1943, O'Neill disowned his daughter Oona for marrying the English actor, director, and producer Charlie Chaplin when she was 18 and Chaplin was 54. He never saw Oona again. He also had distant relationships with his sons. Eugene O'Neill, Jr., a Yale classicist, suffered from alcoholism and committed suicide in 1950 at the age of 40. Shane O'Neill became a heroin addict and moved into the family home in Bermuda, Spithead, with his new wife, where he supported himself by selling off the furnishings. He was disowned by his father before also committing suicide (by jumping out of a window) a number of years later. Oona ultimately inherited Spithead and the connected estate (subsequently known as the Chaplin Estate). In 1950 O'Neill joined The Lambs, the famed theater club.
Answer this question using a quote from the text above:

how was his married life?

Answer:
they had one son, Eugene O'Neill,

Answer the question at the end by quoting:

Aaron Benjamin Sorkin (born June 9, 1961) is an American screenwriter, director, producer, and playwright. His works include the Broadway plays A Few Good Men and The Farnsworth Invention; the television series Sports Night, The West Wing, Studio 60 on the Sunset Strip, and The Newsroom; and the films A Few Good Men, The American President, Charlie Wilson's War, Moneyball, and Steve Jobs. For writing The Social Network, he won the Oscar for Best Adapted Screenplay, among other awards. He made his feature directorial debut in 2017 with Molly's Game, which he also wrote.
Sorkin was born in Manhattan, New York City, to a Jewish family, and was raised in the New York suburb of Scarsdale. His mother was a schoolteacher and his father a copyright lawyer who had fought in WWII and put himself through college on the G.I. Bill; both his older sister and brother went on to become lawyers. His paternal grandfather was one of the founders of the International Ladies' Garment Workers' Union (ILGWU). Sorkin took an early interest in acting. Before he reached his teenage years, his parents were taking him to the theatre to see shows such as Who's Afraid of Virginia Woolf? and That Championship Season. Sorkin attended Scarsdale High School where he became involved in the drama and theatre club. In eighth grade he played General Bullmoose in the musical Li'l Abner. At Scarsdale High, he served as vice president of the drama club in his junior and senior years and graduated in 1979. In 1979, Sorkin attended Syracuse University. In his freshman year he failed a class that was a core requirement. It was a devastating setback because he wanted to be an actor, and the drama department did not allow students to take the stage until they completed all the core freshman classes. Determined to do better, he returned in his sophomore year, and graduated in 1983. Recalling the influence on him at college of drama teacher Arthur Storch, Sorkin recalled, after Storch's death in March 2013, that "Arthur's reputation as a director, and as a disciple of Lee Strasberg, was a big reason why a lot of us went to S.U. ... 'You have the capacity to be so much better than you are', he started saying to me in September of my senior year. He was still saying it in May. On the last day of classes, he said it again, and I said, 'How?', and he answered, 'Dare to fail'. I've been coming through on his admonition ever since".

What did he study in college?
drama