I listened to a dog expert the other day, and he told me something interesting.
When a dog jumps up at lays in the lap, or when, like in this case, the dog lays above the kid, it's not to show affection, but to show dominance.
We humans are doing a mistake by subscribing human emotions and attributes to the dogs actions, instead of interpreting what it really means.
And by doing so, creating an unhappy dog.