So my little boy is turning 8 soon. We are having a party at a local trampoline park, costs £25 per head so obviously we have to really limit numbers. (Previously we have had his parties at home or in the parish hall with a bouncy castle and invited the whole class, some kids from other classes he plays with) As we're limited to numbers there's one kid who previously would have been invited (not in his class but in his year group) but is being left off the list. DS says they don't play together anymore. The problem is his Mum is quite friendly with me and her nose will be totally out of joint, especially as this is going to be quite a cool party for them all that no kid has done before. Is it awful of me to leave the child out and then risk the Mum being mad about it? To be honest the kid himself probably won't mind being left out as they genuinely don't play together..