Born Bette Wallenhorst in Cincinnati, she earned a degree in art history and Spanish from Chatham University and a master's degree in business administration from Loyola University Maryland.
She moved to Baltimore after working at a Philadelphia insurance firm. While an outpatient at Kernan Hospital, she met her future husband, Dr. Albert Henry "Hank" Dudley III.
In Baltimore, she initially worked as a consultant to the Hospital Association of Maryland, arranging executive and staff retreats. She became vice president of human resources at the Waverly Press, working there from 1978 through 1984.
Mrs. Dudley was a gardener and kept a greenhouse. A member of the Hardy Garden Club, she competed in flower shows and made award-winning arrangements. She also tended her own perennial borders and raised golden retrievers.
She spent her summers on Martha's Vineyard, where she enjoyed beach walks and shell collecting.
She had also been active at the Bryn Mawr School for Girls, where a tree will be planted in her name.
A memorial service will be held at 11 a.m. Thursday at the Episcopal Church of the Redeemer, 5603 N. Charles St., where she was a member.
In addition to her husband of 32 years, survivors include two daughters, Katharine Emily Wilson Dudley of Baltimore and Lauren Belding Dudley of New York City; a brother, Michael Wallenhorst of Kennett Square, Pa.; and two sisters, Marianne Wallenhorst of Dayton, Ohio, and Chris Richardson of Evansville, Ind.