Working Back by B.J. Harvey

Girls weren’t on Bryant Cook’s radar until the day he moved next door to the most beautiful girl he’d ever seen. Fortunately for him, Faith Baker fell just as hard that first day as well.
From ages eight to twenty-two, it was the ‘Faith and Bryant’ show, and their happily forever after seemed certain. Until it wasn’t.
Now she’s back after twelve years and she wants what they had.
That’s when Bryant issues a challenge. One Faith can’t resist. After all, her future—their future—is riding on it.
She said she’d do anything. She just didn’t think he meant *that*..