I only just joined the forums last week but so far just being here and reading everyone's stories and advice has been a massive help.
I have just made it through my first week of eating super healthy and exercising every day. I feel better already!! You will too!
I have been tricking truckloads of water, and even though always having to pee is annoying, water really helps fill a hole if you're feeling hungry. I've read in several places that water really is the key to weightloss. I've also found that golden delicious apples or bananas really satisfy a craving for something sweet. As for exercising, I have been walking a fair bit, and also doing the nutbush!!! Haha, I know it sounds silly, but it's a lot of fun once you get past the feeling silly part! Your kids could dance around the loungeroom with you! What fun! Haha. Do it for 15-40 minutes over and over and you'll really get your heart pumping. It's freakin' awesome!
I don't actually own any scales so I'm not getting fixed on a number, but right now it's all about getting healthy, eating well, and exercising.
Being at the forefront of a wedding party is a really big job, and very daunting if you're not feeling good about yourself, I'm sure! It's a great goal to work towards! Like you said, you don't want to steal the day away from your sister, but also think of it in terms of how happy she'll be to have her gorgeous slim sister along side her to celebrate her big day! I'm working towards climbing the Sydney Harbour Bridge in November! Decide on something awesome, and picture yourself that way. It'll be more important than any food. I love chocolate and icecream, and just junk in general, but this past week, I feel really empowered that I have been able to stay away from all of it.
I guess what I've been thinking this past week is "Do I want this *__food__* more than I want to be thin and healthy?" ... Answer? Hell no.
So, best of luck! This is a really supportive environment and you'll be glad you joined, even if sharing your weight and occasional downfalls with strangers can be a bit confronting. More than that, there are a lot of really encouraging people here, and you really will get the support you need from here.