When determining whether extreme hardship is present, USCIS considers the hardship to the qualifying relative (i.e. the U.S. spouse). However, it is often helpful to have a statement from the alien as well. This is especially true when the grounds for inadmissibility are due to material misrepresentation or criminal grounds. You should consult an experienced immigration attorney.
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The hardship has to be experienced by the US citizen. BUT - you should also include a letter yourself, to talk about the problems/hardship you think your spouse will have if you go back home - particularly, if your husband moved with you back to your home country. Since you are asking for a waiver, too, it's also a good idea to talk about how you're sorry about what happened in the past and how you want to make things right with immigration. It's a lot of work and if you have the money to do so, an experienced immigration attorney should be able to help you put together a really strong waiver package.
This general advice does not create an attorney-client relationship.