The Wonder of Your Love by Beth Wiseman

Katie Ann Stoltzfus is resigned to life as a single mother when her husband leaves her to go back to his mistress. In the meantime, Katie Ann's husband dies unexpectedly, leaving many questions unanswered. Her Englisher neighbor, Martha, has "adopted" baby Jonas and serves as his grandmother. When Eli Detweiler, a widower with six grown children, visits family in Canaan there is an attraction between the two. Eli, expecting to travel now that his family no longer needs him, resists the attraction. Katie, still mourning the state of her husbandless life, also resists the attraction. But friends and family have other ideas. A good second book in the series.