Your spouse does not have to file bankruptcy with you in Kansas, but make sure you don’t want to file a joint case, because you can’t add your spouse to the case later.
Judge Dale L. Somers denied an attempt by a debtor to add her spouse two months after she filed her case by amending her petition filed with the Court. In Re Cheryl R. Daly, 07-22628-13, (Bankr. D.Kan. 01-28-2007).
It would be possible for the nonfiling spouse to file his own case and then consolidate the two cases for administration.