First of all glad you're both okay. Those old Town Cars are big and heavy, heavier than the Explorer I bet. Both are certainly totalled.
As for fault, don't be so sure my guess is shared fault. Yes she crossed a double yellow BUT you drove along a line of stopped traffic at the speed limit. Thats a situation where a driver has a responsibility to be cautious and that means slowing down. Thats a dangerous situation to be in, any second one of those cars could get tired of waiting and swing into your lane or, as you found out, someone could poke through being unable to see the traffic in your lane through the stopped cars.
My guess is it will be shared fault.