My neighbour's ex just fathered a baby with his new wife. And her 7-year-old seems to have gone a bit backwards as a result. He's become very clingy, refuses to speak to his father, and what bothers me directly - is throwing the loudest, most ear-piercing tantrums.
What can she do to calm him down and bring him back under control? He's definitely not the boy he used to be. He was always a sweetie, but now he's like a little devil. Am I right in thinking this relates to the new step-sibling?