I can’t stand to be around my stepsister. I realize she has psychological problems and she’s on a lot of medication, but it really bothers me that she can’t control herself, constantly telling the same (only mildly humorous) stories or talking about bowels and urine at the dinner table. She’s like a little kid. I know she can’t help it, but it bothers me to the point that I consider not spending Thanksgiving with my family.