Shakespeare's Christmas ~ Charlaine Harris

This is the third book in the Lily Bard series. Lily has to go back to her home town for her sister's wedding, while there, she learns that one of three little girls, including her sisters step-daughter to-be, is not who she seems to be. Jack has come to town, not only to be with Lily, but to find the girl, and return her to her family. Now Lily feels like she has to help Jack discover the truth.