to let this mum sweat ?

[Partypooper2000]

Mum at school with DD in same class as my DD. Notorious for never replying to party invites, having to be chased, never knows what she is doing on the day 'Can I let you know later' etc etc.

Just handed out invites for her DD's party 6 weeks in advance, so 'she can be organised'.

The bloody cheek of some people. Makes my blood boil.

AIBU to let her bloody sweat and not respond

Epic-fail italicizer anyhoo. .

Why is it a cheek to give 6 weeks notice? Does seem rather a long time but wouldn't bother me.. In fact, being given 1 or 2 weeks notice generally means we can't make it as have other plans. Genuinely don't understand, can someone please explain?

Hard hat at the ready- Am prepared for a roasting for some reason..

It's not a cheek to give 6 weeks notice per se - but it IS a cheek of the woman described in the OP who seems to think she deserves to have everyone's replies well in advance so she can get organised, when she never bothers to reply to anyone else's invitations. In other words, her time and organisation are the only ones that matter in the world, obviously - no thought for anyone else at all. And no manners.

I'd let her sweat but that's just me. I hate people that can't be arsed to reply, it's really annoying especially when you have to pay a deposit up front. My sister booked a bowling party once and sent out several invites two weeks before hand, transport from her house was included to and from the event. Only two parents replied so she cancelled. On the day six kids and their parents turned up at her house expecting to attend the party. Who do these people think they are just turning up when they haven't got the manners to reply. The parents couldn't understand why the party had been cancelled even though they couldn't be arsed to reply when my sister text them to ask if they were coming three days earlier saying if they didn't reply she would have to cancel it.

Yes ok I see, more of a case of her not being arsed to be organised for any other party except one that she's arranging.
Hmmmmm in that case YANBU to be annoyed but if not replying stuffs up the party for the dc that's a but harsh for him/her..

bit harsh

YANBU.

I was brought up to always honour my committments and to not let people down if I could possibly help it. I was also brought up to always be polite and courteous to other people where possible, and this includes responding to invitations.

I think to take an invitation with a casual 'I'll try' is actually very high handed and rather rude. It's implies that the person will come providing they don't get a better offer in the meantime. Obviously this doesn't apply to genuinely unpleasant life events like illness, and so forth and plans then have to change at the last minute.

And leaving invitations open ended like the woman in the OP's post just very often it allows the person to just cherry pick what they do and what they don't want to do and when they do it, without any consideration for the arrangements or feelings of others. This really isn't an attractive personality trait in someone.

What they perceive as them just being busy, other people usually perceive as them being rather rude and self absorbed. I had friends like this who would leave invitations hanging in the air to either let me down, or accept at the last minute as the mood took them. They're no longer friends, just my acquitances as I like my friends to share the same values as I have, and to treat me as I treat them.