We are ex pats and live overseas. DSS's mum wants to take a job in another part of the country for 3 months so she can retrain and leave DSS with us. He can walk to and from school from his mum's and ours it's a 20 minute drive each way to a bus stop. This has literally been dropped on us, as she wants to move next month. My parents are coming to stay for 6 weeks during the time she wants and we've already got trips booked (during school days) that we'd need to cancel, or me hire a car and go alone with my parents and leave DH here. Plus we'd feel pretty guilty doing anything adult only and leaving DSS at home, but I've only seen my parents once since COVID when I managed to negotiate a 'work trip' to get my back to the uk for a week. DH is travelling with work during that time too, so I'd need to negotiate flexibility with work to get him to and from school, I'm not asking my parents to get a grumpy 15 year old out of bed at 7am or be at home by 4 to collect him. We are both happy to look at any other 3 month period this year. Just not her suggested dates. Is that fair?