Sorry to say it, but I think you will be held at fault. You made a left turn in front of an oncoming vehicle. Her speed may be a factor, but you still turned in front of an oncoming vehicle, and should not have until it was safe. Yoy got hit, so it wasn't safe. And I take offense at you're statement about her age. I'm 64 and I consider myself an excellent driver. I have been in 3 accidents in 47 years of driving and only one was my fault. And I race at a sanctioned NHRA facility with reaction times that are competetive with 20 yr olds.
89 LX Notch: Floo-Tek 5.0X heads, GT-40 intake, B-303 cam, Dynamic 3800 converter, 4.10:1 gears & lots of suspension work. 12.50 @ 106.42 MPH.