@psychphysicsgirl,
If she has severe anxiety I would reccommend putting her on an anti-anxiety medication like and anti-depressent or a benzodiazepam. Some examples of these would be effexor, clonazepam or celexa. There are a lot more but I won't go to in depth on them
There is also something called cognitive behavioural therapy that can be really helpful for the person. What the therapy would do would change the way the person thinks in for example a social situation. It would also build on social skills training and special exposure techniques. Ofcourse they wouldn't just put you right in a tough situation right away. It would be gradual and slow at first. It is tough but accomplishable.
There are also other psychotherapies out there that can be just as beneficial to treat avpd.