Instant Marriage, Just Add Groom by Myrna Mackenzie

No one was more surprised than Caleb Freemont when the town's prim-and-proper bookstore owner made him an offer no red-blooded male could resist. But fathering a child with innocent Victoria Holbrook and walking away was not an option. Caleb refused to fill the position...unless Victoria said "I do."

Victoria didn't want a husband, but she desperately wanted a baby. And Caleb seemed the best candidate for her plans--handsome, caring and the most resolute bachelor in town. So how had she ended up married to him? Worse still, Victoria found herself falling for Caleb. Could she somehow convince her new husband that their marriage of convenience might be something much more?