She's not charging for damages to the rest of her gear or herself.

I think she should just stop by sometime and speak to the wife. The husband has already offered to pay for half of the helmet & wheel (and truthfully if a new wheel & a helmet is only $200, they got off lightly - because I couldn't replace one of my wheels for $200), so getting them to come up another $50 or $100 shouldn't be too bad if you speak to the person that actually saw what happened.