Love in the Long Run by Allison Carter

A fake relationship. Twenty-six point two miles. No shortcuts to the truth.

Amy Price does not make reckless decisions. Then, at her ex-girlfriend’s engagement party, she announces that she is running the Lake City Marathon—even though she cannot run a mile.
Dani Reyes is the irreverent personal trainer assigned to get Amy to the starting line. She knows the course, the training, and every way a runner can fail. What Amy does not know is that Dani has started the marathon twice and finished neither.
When a couples fitness challenge offers Dani the money she needs for an endurance-coaching certification—and gives Amy the perfect chance to prove she has moved on—fake dating seems like the logical solution. Their rules are precise: train together, perform for the cameras, win the prize, and keep real feelings out of it.
But between six-mile pancake runs, family dinners, one hotel room, and kisses that stop feeling staged, their careful plan becomes impossible to audit. Then Dani makes a race decision without telling Amy, putting their trust—and their future—on the line.

To reach their happily ever after, both women must decide whether love means never stopping…or choosing honesty when the next step is uncertain.