We were questioning whether she really WAS the brother to the Dad. Honestly, the girls were talking and the one says, "We've known her for a long...well, since we were born".. as if she caught herself almost blowing it.
Not as if it even matters, just an observation.
Too bad they didn't keep her until AFTER the lie detector and reveal her before elimination. Betcha she would have been 'reporting' a lot more POTTY MOUTH talks.