Tempest in Eden by Sandra Brown
Shea is a nude model and she drives to visit with her mom and her new husband. She also now has a brother via her moms marriage and she likes what she sees as he steps out of the shared bathroom at her moms house.
Over the weekend they become friends and even more than that as the wine flows freely. She goes back to the city and he comes to visit and she attends his service to find out about his job.
Erin is a minister. She can not see the relationship going anywhere, He, on the whole is against her profession and he is a man of God.