To my untrained eye, I'd say there's something not quite right about the lighting on BO's face, and the position of Grandpa's hand on (or near) his shoulder. Was someone else sitting there and "erased" so BO could be pasted in?
Several months ago, there was a discussion about that photoshopped photo. It might be posted on the long thread.
In the original photo, only the two grandparents were shown sitting together. There wasn’t a third party in the photo.