ds had an invite left through his preschool door today from a child that went to 'big school' in september. Usually i am quite happy to take him to parties and play dates but this is the first one he has been invited to on a weekday school night. The party will be finished by 6 but my ds goes to bed at 6 and there is no way i could get him home awake. Also his sister goes to bed then and as she hasnt been invited as she only 1 i would have to sort babysitter out for her. Like i say i would usually let him go to every party he is invited to and in the past have even changed family plans so he can go to them. I wonder aibu to tell the mum we cant make the party and not say anything to ds as he doesnt even realise he got an invite today or do i bite the bullet sort a sitter and hope i can get him back from the party awake wwyd?.