Were the kids adopted?
I apologize, but I didn't get to tape the beginning of the movie. I was wondering throughout the whole thing, though. Were they adopted?
The reason I thought they were is because there is the photo of the parents alone, and then the camera pans to a photo of the two kids fully grown, standing with the parents. Everyone I know with biological kids has photos of them with their children at various stages of childhood. Their room also seemed empty of all the kinds of things kid accumulate during a lifetime. It was very bare of toys and posters.
The mother references their birthdate and that they had no abnormalities or mental issues. It seemed like the kind of information you would get if you adopted children, not if you had given birth to them and known them for ten years.