People asking if they are invited to our wedding...

It takes so much of this problem away to get married secretly we're "modified eloping" with 20 friends and family and everyone else will be suprised. the only two issues I've encountered was FH's mom inviting his uncle without asking, which dosnt bug me because his family is so supportive and I'm SO glad they'll be making the trip, and now I'm facing if two of his his sisters will bring dates. I'm not sure I want to put my foot down and say "no" (they are karashian level drama), and hoping none of them will feel the need to pair up to bring someone. estsblished significant others are fine, like one sisters new fiance, because he's now practically family, but the other two, if bringing a date, would be bringing someone none of us know to an intimate wedding. awkward lol