2001 Guideposts hardcover, Nicola Furlong (Plots and Pans). Gracie's niece comes back for a visit only to be terrorized by a secret admirer who turns out to be an ok guy. The twins are being watched by some strange guy who turns out to be their dad. Dennis and Becky want to get married but Becky's dad wants her to be a banker and not the writer that she wants to be. - Guideposts
This book is part of the Church Choir Mysteries Books series and is book #2 in the series.