These cakes are absolutely beautiful! What a lot of time, effort and love must have gone into producing these for you. I think it's amazing that home bakers can produce cakes that are every bit as beautiful as those you can buy from a professional. I love cake decorating too, but I am nowhere near the same standard as your sister. It's lovely to see pictures of other people's creations.
Well now -- not to be picky or to sound mean -- the cakes aren't quite even, but then again many professional cakes also aren't. I guess I just am overly critical, like the person who comes in an rearrange the frames!
That said, the colors and the smoothness of the cakes are beautiful. They look delicate and elegant, simple and tasty, exactly the kind of cakes that deserve a place of honor at a wedding! She really does love you a lot. I would also want to be able to decorate like this! Practice, practice...
Congrats on your wedding, by the way.