I agree with that statement.
Get that back checked. Do you live in a state in which family can't treat family "professionally?" If something happens that you need the hospital, such as PT later on down the road, then now's the time to get there, even if just for a good exam at the ER. Get her insurance company onboard now, so they have it on record you were hurt now. Anything in the future associated with this injury due to this accident will still be billable to her insurance company.