Your sister has always been competitive with you, so of course she's going to turn the dial up to Level 10 now that you're in the spotlight, everyone's happy for you, you're getting parties and gifts and your dream day. What can you do about it?

Not much.

Sorry to say, but you're not going to be able to get her to change. She's not going to all of a sudden become a secure person who's joyful for you...even if you think she should be. After all, her life is golden. She has the beautiful house, the loving husband, the gorgeous kids, a fabulous career, her health... it really doesn't matter. Some people are just so used to being competitive, and trying to drag others down, that they really don't see any reason to change. I hope your sister can grow up a little bit, especially now, but don't bet on it.

Here's what you can do. When you're with her, don't talk about the wedding incessantly. She might take it as your rubbing your happiness in her face, which is not your intention, but insecure people take things strangely sometimes. This isn't to doormat yourself or give in to her. It's for your Peace. Why give her an opportunity to say something cutting or rude? Why invite her to wreck your day? If you have to talk about a reality show or what her kids are up to these days, benign conversation is probably best. When you do need to talk to her about the wedding, that's one thing. But she'll be less of a drain on you if you're able to focus on other things sometimes.