Ship of Fools (Fandom Hearts #6)
Cathy Yardley

Now hell has frozen over. When Rachel's sister Cressida has an emergency, she swallows her pride and asks Ren for help. In exchange for getting Cressida out of her jam, Ren asks simply that they catch up when everything calms down. Which leads to a date. Which leads to a kiss that reminds them both of just what they've been missing all these years.
Ren never stopped loving Rachel. Now that she's back in his life, he'll do whatever it takes to keep her there. Rachel is wary, and rightfully so - he's stepped into his rightful place in the family business, working 80-hour weeks and having no social life to speak of.
Rachel is stuck between the desire she's always felt for Ren, and the remembered devastation she felt when he left her high and dry with a ring and an apology. Ren is caught between family obligation and the love of his life. Can this ship set sail, or are they sunk before they even leave the harbor?