Good for you for saying something to start with! That must have been very awkward. I am an absolute cars seat safety freak (hence the little RF seat in my avvy ) I'm with Nickle730, I would get her rego and notify the police. Then your conscience is clear if something happens. In an accident a FF baby is at high risk of spinal injuries even death. If the police don't do anything then you have done your part there isn't much else you can do. Sad that the mother isn't as worried about her baby's safety as we are though Maybe she's not aware I guess