I'm in a relationship with the mother of a 10-year-old boy. She's having an exhausting time dealing with him challenging and/or ignoring everything she asks him to do. He has pretty regular tantrums, sulks - I've even heard him knocking holes in his bedroom wall with some blunt instrument. We don't live together so only see each other at weekends, mostly me staying at hers. He's basically a good kid - bright, sociable with other kids and doing well at school - but these explosive mood swings are very hard on her. Can anyone suggest strategies? I don't have kids and really have no idea what to suggest.