Its simple, if you don't want a shower, don't have one.those who want to (and can) get you something will do so whether you have one or not
Well, this worry should be out of your hands (and technically out of your mom's also) because neither you nor your immediate family are supposed to throw a shower, according to Emily Post. This stricture apparently comes from the long-ago notion that the family is of COURSE going to give you things, like it's their job, and so they are not supposed to be the one soliciting contributions, only friends who do it voluntarily will are supposed to throw showers. Don't you love it when your own impulses are consistent with white-gloves etiquette?