sentences:  During the early years of the marriage, Boulton modified her writing and had two stories published by "The Smart Set", an important magazine co-edited by H. L. Mencken and George Jean Nathan.She gave birth to Shane O'Neill in 1919 and Oona O'Neill in 1925.The marriage came to an end when O'Neill left Boulton for the actress Carlotta Monterey in 1928, and they divorced in 1929.