Tardive Dyskinesia and Pregnancy

I was hoping that someone could help me with something that has been keeping me up at night. My daughter has Tardive Dyskinesia but I am confused why it has gotten so much worse since her pregnancy. She developed it 4 1/2 years ago after taking Risperdal and Prozac and her movements were there but not that bad. She got pregnant had her son in 2009. It wasn't that bad during pregnancy but after she had my grandson they got much worse. Is it possible that her body chemistry and the hormones being out of whack that it made her condition worse. I just don't understand why it has goptten so bad. It is now effecting her breathing too and her facial movements are out of control. I don't know if this is a side effect but her hands shake too, not bad but if she holds her hands out they shake as if she is nervous. This is a devastating disorder and I was wondering if there is any hope for this. She has fallen into a deep depression and to make matters worse my grandson who is 20 months old and learning different things is now imitating my daughter and it is breaking her heart. Could someone please help and give us some hope. Thank you all so much for taking the time to read this.

Tina