What you want to do is wrong. The marriage is only 3 years. There isn't going to be alimony. The only issues are dividing up any assets that the two of you acquired during the marriage.
And if the court views you as being deceptive to get a settlement in your favor instead of a fair one, your stbx could end up with everything. Including alimony.
As my former stepfather found out. He tried to pull one over on the judge. He ended up paying alimony to my mother for a year on a marriage that lasted less than 6 months. Had he not done that, there would have been no alimony at all.