Heidi Betts is a USA Today best-selling author with a talent for penning deeply passionate romances. In Her Little Secret, His Hidden Heir, millionaire Marcus Keller is pleasantly surprised to run into Vanessa, his ravishing ex-wife, but he's shocked to discover the son she's been keeping from him. He's determined to play a part in his son's life, but while Vanessa expects it to be strictly business, Marcus entertains a secret agenda -- winning Vanessa back for good.