i'd just leave her to "cool off" for a few days. has she got anything going on in her life at the mo or a bit stressed with work/kids may be?? or it could even be jealousy hun. it has a tendancy to come out when someone else is the centre of attention (theres a few people i know like this) i'd just leave it a while and see if she comes round, in the mean time dont worry hun enjoy your wedding planning xxhugsxx

i'd definately have a talk to her hun and if you cant do it without getting mad could a family member or frend talk to her. it is hard particularly with it being your sister too. its better t know then just getting yourself stressed. good luck x

i had this same sort of problem with 2 girls ~(well H2B sister and his sister in law) - they were not responsive to invites and plan making - it was like they werent bothered. I sacked them in the end because i couldnt be dealing with all the drama! Now i have my sister and best friend.. they are great.

With it being your sister, it could be a jealousy thing, I would leave her for a few days and try not to make it into something too stressful for yourself. Is she MOH or anything? If she isnt then I would rely on the one that is - your sister will do what she wants by the sounds of things so there is no point in having her in a role of responsibility.

I hope it sorts itself out! xxxxx

My mum is exactly the same way i invited her to come dress shopping with me over the weekend and she was the only one who didnt show up, no excuse just didnt show up :-(
If i mention anything about the wedding all i ever get is you have plenty of time and thats the end of the conversation and thats with both my sisters too (although they have been great my baby sister is paying for my dress and my older sister came shopping for it with me and is paying for my 2 nieces outfits). Even when my date was april 29th next year the response from all my family was the same, the only one who has been great is my mate who has offered to make my cake, found my tiara, found me a flowerist and is helping me make personalised napkins for the top table :-) (trying to think of something to make her part of the day cause she's great).
At the end of the day WE are excited because it is our day and yes you only have 10 months to go which for us is nothing but for your sister shes proberly thinking ahh you have 10 months yet.... plenty of time??
don't worry hunny i think nearer the time she'll be as excited as you are, after all she is your sister :-)

I get how you feel, my mum refused point blank to talk about the wedding and we have been engaged for a year. It's only recently that she has asked us what kind of 'do' we want because I asked if she wwanted to contribute towards the costs.. but then she is an accountant.
It may be jealousy or the fact that its 'so far away' so I would give it a little time but have someone as a backup :)