DS1 is taking his GCSEs this summer. His first exam (French oral) is on 29th April and the rest start on 10th May. He has ADHD and challenging behaviour so needs a huge amount of support (coersion/blackmailing) to do any revision at all. I am divorced from his dad who does very little to help. Problem is, DH wants to go on holiday in April to see his mum for her 90th birthday in the US and, if I went, it would involve me being away from DS probably from 6-13th April. My mum would come to stay to look after DS and DS2 but it's unlikely she will get him to do any revision. I have told DH that I cannot go away until after DS's GCSEs as he needs me around. DH still wants to go as it's his mum's 90th and he wants to take our 5 year old DS with him. I am torn over what to do as I feel nervous about my 5 year old taking a 14 hour flight without me and then no seeing him for a week. Any thoughts/suggestions welcome.