My DD has just been invited to a birthday party on her 4th birthday. What's the etiquette here? Ideally I'd approach the mum and ask if she'd like to do a joint party, but it's a whole class party at an expensive venue and there's no way I could afford that. Should I say anything to the mum? I'd hate her to think I'm trying to muscle my way into the party but at the same time I'm not sure I could trust a 4 year Old not to mention IT'S MY BIRTHDAY TODAY!! If I don't say anything. Is there a graceful solution to this?