This is an absolutely beautiful piece. I love the light through the trees, and the glimpse of the towers off in the distance, and the imp has great personality.
Still, I wonder what the "mood" of the piece is supposed to be? The title and the fact that it's the whole family implies "sweet family moment", but the parents come off as (unintentionally, I assume) a pair of handsy teenagers while their son is babysat by the reluctant imp. That's just my impression, anyway.