The Secret Wife (Mills & Boon Vintage Superromance)

How did this nice girl end up as the other woman? Even worse, how did she end up the other wife? Until she met Eric, Maggie McGuire had been above reproach. Now she's been forced to drive cross-country to ask for help–for her child, not for her–from Eric's family. And there, to her horror, she discovers that Eric is already married.