i knew a girl who was the same way.
Topical antistatic, there are a number of them you can get over the counter. But that is the more drastic choice.
The girl I knew was so scared that it was going to hurt that she unknowingly clenched her pussy muscles so tight you couldn't force a finger up her. She was tight to start with but as soon as she started to think about penetration she clenched up.
Relax her somehow. Massage, hot bath, relaxing music. Drugs are an option legal and illegal. If shes over the age of consent, her doctor might be able to help, but I wouldn't count on it. Any sort of muscle relaxer should help some, lots of girls get them for period cramps. Pot could relaxer, or anything that gets her a bit hi.
