What to do about an OVERLY religious mother in law?

IF SHE THINKS SHE KNOWS THE BIBLE ,, AND DOING GODS WILL ,, THEN TELL HER TO SHOW YOU WHERE IT SAYS THAT BLACK CATS ARE EVIL,, ASK HER TO SHOW YOU,, WHERE BEING DEDICATED TO A CHURCH WILL SAVE YOU ,, TELL HER THAT THE DOC. WILL SOON BE ABLE TO TELL IF YOU HAVE A BOY OR GIRL AND THEY MIGHT NOT HAVE ANYTHING TO DO WITH GOD ,,, YOU SAID IN YOUR Q,. THAT SHE IS A NEW CHRISTIAN ,, ASK HER TO TELL YOU HOW SHE GOT OFF THE MILK AND GOT ON THE MEAT OF WHAT THE BIBLE TALKS ABOUT SO QUICK !! ESPECIALLY TO THINK SHE IS A PROPHET WHICH THERE IS NO SUCH THING NOWADAYS !!! THEY WERE IN THE BIBLE !!! AND WE DO NOT NEED SOMEONE TO TELL THE FUTURE ,, THAT IS WHAT THE BIBLE IS FOR !!! EVERYONE DOES NEEDS TO GET RIGHT WITH GOD ,,,AND SOON !!