If one application for two B-2, what are the relationship of them?
-You are F1 and your spouse is F2, so both you are the same status category (i.e. F) currently. Thus, you can use one I-539 to change to B2 at the same time. If your status was F1 and your spouse's was H1, then each of you have to file your own I-539, respectively, to change to B2.
Hope master 8 give me more explain