were any details exchanged?
you could always report the accident if not. your wife tried to provide insurance details, name and address, but the other driver became abusive…
if no details were exchanged you are obliged to report the accident anyway within 24hrs.
otherwise, when you speak to her, i'd just say that you have a witness, if she wants to pursue it, then here are my insurance details, please give me yours. that's what you pay them money for. fill in the form and forget it, but very likely it will never get that far due to excess, as suggested above.