My step-daughter (28) has shared custody with her ex. Divorced now for 2 years. It’s a 2-2-3 arrangements where they alternate weekends. On his weekends he takes the children (7, 5 and 3) to stay at his new girlfriend’s house. The girlfriend has a son (7) who has behavioural issues for which he takes medication. The 3 children are generally good-natured and happy. But recently on the Monday’s following their weekends with their father, the oldest boy comes home from school aggressive and rude and has uncontrollable fits of crying. The father is aware of this change in behaviour. He says there is no issue at his girlfriend’s home that could be causing the problem and says my step-daughter should do her job as a mom and manage the 7-year-old. The 7-yr-old’s behaviour is also impacting on his younger brother and sister. We are looking for helpful tips/solutions from mum’s who may have experienced similar situations. The dad is actually not a bad guy. This isn’t about bashing him. We are already looking into possible counselling. But thought some mums might have interesting suggestions