Strongly opposed the marriage of daughter
Dolores Costello to
John Barrymore.
Maurice knew of Barrymore's history of womanizing and heavy drinking and was strongly put off by the fact that Barrymore was closer in age to him than his daughter,
and he frequently begged his daughter not to go through with it, saying
that it would not last. She went against his wishes and married Barrymore anyway. Maurice
was proved right when the marriage did not even last ten years.