Marrying My Billionaire Foster Brother

*The realization struck me with sickening clarity—marriage was for the perfect society wife in public, while the black card was for his foster sister in the shadows of his bed. I loved him, but that love meant nothing in the face of a black card! That scumbag! Why should I love him?* Hope Carter, the daughter of a driver, became the adopted daughter of a powerful family after her own family fell apart. James Russell is the heir of that powerful family. Under the influence of alcohol, they had a one-night stand, and James proposed to support Hope with a black card, but she could not accept it. As emotional entanglements develop between the foster siblings, what will their future hold?