A Chaunce of Riches by Chelle Cordero

Ben Johnson was hired as a bodyguard for a rich widow and her kid, but he never expected to be working for the woman who had abandoned him just when he had needed her the most. Damn it all, he still wanted her. Samantha Chaunce never thought she would have to explain why she married the rich man instead of Ben. Or that her husband had been murdered...and Ben was the prime suspect.