I must confess that I am posting under complete ignorance, as I am waiting for Kidnapped to be finished before reading it. However, seeing the matter at hand, I couldn't help but throw in my two cents.
I was adopted by the people I consider my parents. My biological mother couldn't keep me for some reason, so I was put up for adoption. So Michael and Terri McKenna found me, fell in love with me (who wouldn't? <g>) and adopted me. They are much more my "real" parents than my biological parents could ever be. They have raised me for 15 years and treat me like I was their own flesh and blood. If given the choice to go live with my biological mum and dad, I don't think I would, no matter how wonderful they may be. They would never truly be my parents.
Take it however you like, its only my opinion.
Caroline