Negative comments from MIL

xoxo

My MIL always seems to have some negative shit to say. My first baby is such a good baby, and now that im pregnant with #2 shes always making comments about how bad the baby will be and how it'll be a "demon child" because its impossible to get two good babies in a row or what ever. I get that shes probably just joking around but I hate all the negativity shes putting out towards my child. Then when we found out its another girl she went on to saw how they're going to hate each other. It pisses me off but idk how to respectfully counter her comments.