Filthy Rich by Matilda Martel

Declan McCormick is filthy rich. He’s gotten everything he ever wanted, but always wanted the wrong things. At thirty-eight, he’s single, works seventy hours a week and comes home to an empty house every night.
Something needs to change.
Ava Jameson has come to New York to finish school. With rich parents, she’s gotten everything she ever wanted, except their time. But she swears to do things differently. She has big dreams and one of those dreams is building a better family than her own.
When their paths cross, sparks fly. Declan charges full speed ahead but soon discovers the love of his life isn’t so easily impressed and isn’t interested in being the heroine of her own billionaire romance.