Storm cloud marriage

From back of book:

He'd never ask a second time Sandra had known Randall Pearson forever. Her father's totally dependable deputy, he never stepped out of character. Until the night when he'd surprised her by asking her to marry him. Sandra had rejected him, of course. A gray, faceless character with a mild manner who hid his thoughts behind horn-rimmed glasses, Randall was hardly the sort of man women dreamed about. Or was he? Four years after Randall's proposal, Sandra wasn't so sure. And now she was the one doing the pr