Splitting Heirs by Diane Michaels

In her dreams, Lauren sells the most fabulous properties in New York City. In reality, she’s scraping by on the tiny commission she earned seven months ago. Plus she just accidentally set fire to the only other listing in her portfolio.
Lauren hopes inheriting a small share of her eccentric great-aunt’s real estate fortune will be the win she desperately needs. But there’s no such thing as easy money. Before she can earn her inheritance, she has to compete against her family in a series of quests. To make matters worse, the quests involve the surprise reappearance of Johnny, the bane of her existence in high school and definitely the last person she wants to see.
As the circumstances push Lauren beyond her limit, she discovers the prize she’s fighting for may not be what she thinks it is. And the more time she spends with Johnny, the more she wonders if she is also spectacularly wrong about both him and her life-long dream.