Game of Pretend (Heartsong Presents)

is book #525 of the Heartsong Presents line.
==Book Description==
How far is love willing to go? — With her life nearing its end, Millie Steele wants desperately to see her grandson's faith restored - and him happily married to a Christian girl. When she enlists Kally McCoy as her home caregiver, the pretty young woman's presence seems only to antagonize Preston Steele. — Preston loves his grandmother and, wanting to see her rest in peace, pretends to fall in love with Kally. He puts on a good act and even attends church with Kally. But soon, the things he hears at church and his growing friendship with Kally begin to make a real change in his heart.... 
(Description from paperbackswap.com)