I'm normal...?!

So I was visitng my grandma recently and it was her, my mom, my friend Miquelle, and myself in the room. My mom and grandma were talking about how they recently discovered that the age of the father can effect the babies chance of being autistic. Then my grandma brought up how my parents were older when they had me, and then says "and Kate's normal". My mom: "Kate's normal?" Miquelle: "Kate's normal?!" Me: "I'm normal..?!" Not quite sure where she got that from.