Has any1 got engaged/married but doesnt get on with his sister?

Shanno, you have to understand one thing when you deal with any sort of in-law situations: you can only control your behavior...not anyone else's.

With that in mind, Im going to say your best bet is to be absolutely consistent in your behavior. Be nice to her, ignore her snide remarks and meanness. Pretend as if you didnt hear anything when she says something hurtful. Its not worth your time or effort to dwell on such things.

Plus, she is human, she cant stay mad forever and if she did...people around you would start resenting her for being mean to you. She would look like a fool if she stayed upset with you for no apparent reason even though you are trying so hard to mend fences and be nice. Even your fiancee would notice that and respect/love you more.

You are lucky woman! You dont have to live with someone who mistreats you like that!

Kill them with kindness, its foolproof. I realize its easier said than done but its a permanent solution...not just a band-aid.

Good luck!