HUDSON, Mass. (AP) – A woman who stopped to help a driver who was seriously injured in a crash was surprised to discover that the victim was her own grandmother.

“I thought to myself, I need to go help this poor woman,”‘ Heidi Currin told the MetroWest Daily News of Framingham. “And as I got up to the car and started to help the woman, I noticed the car and I realized it was my grandmother.”

Hudson police said Doris Girouard, 83, of Marlborough, was seriously injured Tuesday afternoon when the car she was driving clipped a van parked on one side of the street, sideswiped a guardrail on the other side of the street, then went airborne, smashing into two trees before flipping over.

Girouard was in good condition Wednesday at the University of Massachusetts Medical Center in Worcester, according to a hospital spokeswoman.

Currin said when she saw the accident, she pulled over and told her children to wait in the car while she ran to the mangled vehicle.

Hudson police Capt. David Stephens said the accident remained under investigation.