Well, my sister who originally wanted only a "professional" wedding cake, has changed her mind. She would "just love it if I would make her wedding cake". Now, I'm already doing the flowers and am the maid of honor... not to mention that my husband and all four children are in the wedding party. At this point, I just don't think I can take on her wedding cake as well. I'm also throwing her a shower in November. How do I explain this to her in a way that won't hurt her feelings? I love my sister, but I am only one woman. Help!
Simple (I know, easier said than done).
Make it about YOU, not her. YOU are just "overwhelmed" with "other things" and just don't feel that you can take on one more project. I was going to say tell her that you appreciate her asking, but maybe that's not true 
so just try and be as honest as you can about it. Seems like the truth IS that you just don't feel that you have the time or the energy to get everything accomplished and doing a cake, as you know, is a huge undertaking.
Hope this helps. Good luck
I wonder if she went to a "professional" and found out what they charge????? I would just say that you took on all these other things because you weren't going to be making the cake.........who knows, maybe she'd get someone else to do the bridal shower and finish the flowers in order to have you make the cake???
I hear you, girl!! In 2004 I had 3 sisters get married within 6 months of each other and you guessed it....I did all 3 wedding cakes! Plus I was in the weddings as was my husband and 3 kids. We had the showers, bachelorette parties, rehearsal dinners, 2 of the weddings were out of town so we traveled with kids, cakes, luggage, gifts, etc. AND 2 sisters wanted cake AND cheesecakes! Whew! 
It was a crazy six months, but I'm glad I did it. I am one of 5 girls in my family and my sisters mean the WORLD to me. They are truly my best friends and I was happy to do it. I know if they could, they'd do the same for me in a second!!
Good luck to you! 
I think that you all are right. If I just it down and explain it to very nicely, she'll understand. The thing is ... I know she has had a couple of tastings, and I think that she went through sticker shock. She did the same thing with the flowers. I know she wants me to enjoy the wedding, but with all that I'm doing, I think the cake would just be too much. You guys are great!
Tell her that it would be a disservice to her becasue you couldn't possibly do your best job with everything else involved.
On the other hand....I am also making my sister's wedding cake. 350 people
What I am doing is making a dummy cake well in advance, except for one tier that they will cut in front of the zoo...I mean guests.
There will be sheet cakes in the kitchen (that I am not making) that will be cut for the guests. Maybe that could work for you too.
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