The Marriage Bargain by Mia Porter

Seven year old Andrew Fielding wants a mom, and he’s convinced his dad could use a wife. He thinks he’s found the perfect woman for both of them: Megan Sanders—which is fine with Megan. The Fielding men have their attractions. One is as cute as a button, the other is breathtakingly sexy. Together, they’re the family Megan’s always wanted. But convincing brooding widower Kane Fielding that they’re a match isn’t so easy….
Kane is determined to keep his distance from the beautiful, sassy, Megan Sanders to ensure his dark secret stays hidden. But to keep his son from being the center of a custody battle, Kane is prepared to do anything to keep Andrew safe. Even the one thing he’s promised he’ll never do again…get married.