How to convince my stepmother to get help??

oh sweetie I'm sorry you are living in this type of environment~if things are this jumbled up just think what she is doing to poor little Daisy's state of mind~sorry to say there is nothing you can say or do for her to get the professional psychiatric help she so badly needs~your dad may be able to if they are legally married if not then it's just a crap shoot~he can have her committed into a mental health care facility but only if he is her legal husband♦