Her wheels were straight, she wasn’t making a left turn. She had just hit a Prius who had either stopped or slowed in an unusual place. To take a left where the accident occurred means you were either doing a u- turn or driving onto the beach.
The impact can throw a rear ended vehicle in the opposing direction of the impact. IOW, if a vehicle is impacted off center on the right rear end for instance, the impacted vehicle will move forward to the left in many cases. In this case it seems, into on-coming traffic.