Maybelle Berretta married a Philadelphia attorney named M. Randall Marston in 1917. She had a son, M. Randall Marston Jr., born in 1918. In 1934 she had another son, after an affair with singer Nelson Eddy; the child was raised by adoptive parents to protect Marston's and Eddy's reputations. Maybelle Berretta Marston died in 1983, aged 87 years.