Not Always a Saint — Mary Jo Putney

The Black Widow

Daniel Herbert has come to London in search of a wife, someone sensible who can oversee his newly inherited properties, leaving him free to pursue his life's work as a doctor. He never expects to become intoxicated by a woman as mysterious as she is shockingly beautiful...

Jessie Kelham's looks have always been a curse. Now alone with a young daughter and a perilous secret, she is in need of protection. But dangerously attractive Daniel is not the kind of husband she has in mind. If he recognizes her, the demons of her past will surely erupt. Yet they cannot keep apart, and soon they are drawn into a union that may bring joy -- or shattering danger...