Christa's forbidden secret: Book 1 from series The Stevenson's Sisters (Volume 1)

Falling for your sister's man is already a sin, something forbidden which Christa never thought could happen.But falling for him when even law prohibits that is another story. Can Christa overcome all the obstacles this forbidden love will bring with it? Can she survive all the problems and troubles she'll have to face to be able to keep hiding her forbidden secret?