Shine on, Bright and Dangerous Object by Laurie Colwin

When Sam Bax, that charming daredevil of a Boston lawyer, sails his boat into a storm off the coast of Maine, Elizabeth "Olly" Bax, his wife and ardent sidekick, becomes a widow at the edge of twenty-seven. With no pretense of "courage", Olly grieves, coping with the warmth and awkwardness of family ties and trying to rethink her own life. Realizing that her risks are as daring as any of Sam's -- while he chanced life and limb, Olly risks her heart -- she finds that love can take some surprising turns.

Laurie Colwin depics Olly's recovery with humor, compassion, and a decided lack of sentimentally, creating a real heroine who remains true to her heart and still manages to keep her head.