That's the problem,  she's really digging in this time for some reason.  I told her outright it's not possible to survive if your body is only using 400 calories a day and she said "oh yes it is".  I also told her pcos has been shown to not cause weight gain directly and she still insists that it does for some people.    That's what has me scared.  She's talking like one of them.  It's like a zombie movie when someone starts to act odd because they've been bitten.  I'm afraid she's going to declare herself the exception to all the rules and just balloon if I don't do something.