Read and choose the correct answer

My name is John, and this is my story. Last year just before Christmas my family and our cousin and uncle and aunt decided to go to Perth for holiday. We went in two cars but when we were about halfway there my uncle wanted to turn round and come back. He said it was too far, and it was terribly hot too, one day it was 480C . Even at night it was really hot. Anyway, what we decided to do was to drive back about 160 km to a place where the train went through. Then we put both cars on the train and we all went to Peth by train. That was fun. It was a good train.

We had a good time in Perth but we had to cut our holiday short. You see, while we were there my grandmother (my mother’s mother) in Melbourne died. Most of us flew back but but my Dad and my uncle came on the train with the cars and then had to drive back to Melbourne from Port Pirie.

It was a really strange holiday because nothing went the way we planned it.

Who died when John’s family were on holiday?