BOSTON (AP) _ A smiling Kitty Dukakis came home Tuesday from a month-long stay in an alcohol treatment program, escorted by her father and her husband.

With his arm around her waist, Gov. Michael S. Dukakis asked, ''Doesn't she look terrific?''

Mrs. Dukakis, 52, entered the Edgehill Newport treatment center in Rhode Island on Feb. 5 after developing a drinking problem that her husband blamed on exhaustion and the letdown following his failed presidential bid.

Mrs. Dukakis was driven home by her husband and her father, conductor Harry Ellis Dickson. On the way, she visited her 5-week-old granddaughter, Alexandra Jane Dukakis.

Emerging from a car outside her Brookline home, Mrs. Dukakis smiled broadly and waved to reporters and photographers. Asked what was the best part of being home, she said, ''Being with my husband.'' The governor added, ''Being with my wife.''

The governor and his wife quickly disappeared inside their home.

''We and our family are extremely grateful and deeply touched by the love and support she has received from so many people,'' Dukakis said in a statement.

The statement said Mrs. Dukakis expects ''soon to resume a full and active schedule.'' She recently signed a book contract and launched a public speaking career.

Edgehill, a 160-bed facility founded in 1980, operates an intensive 28-day alcohol program that serves more than 1,000 patients a year.

Mrs. Dukakis had revealed during her husband's campaign that she had earlier conquered a 26-year addiction to diet pills.