welcome. I've just had a revelation, and if it's true, changes everything in my eyes. As Misty very well could not be able to respond normally, and we have some classic indicators of what this derives from. I hesitate to give it a name, because I don't know enough. But it needs looking into. Seriously and without bias. Give Misty an adult mental Competancy test, aka IQ. Give her the basic diagnostic testing done during school life, regular doctors visits when most parents bring up issues with their children that I don't believe Misty has ever had anyone to care about for her.
If she scores out in the way I'm believing she may as now I've put some important things together in my mind, we have answers. Discovery is a paramount thing in a childs life. If we have an adult, and parents aren't paying attention or caring, these kids fall through the cracks. Major medical conditions go un-diagnosed. I'm numb and torn with what I know on my end.