Just joking about my age not being higher (yet!).
If I would have said 'great granddaughters' I would have been a dirty creep. If a girl present at that race was 25 in 1970, she might have had children between 1972 and 1982. Their would make their daugthers between 36 and 47. The latter category would have daughters that could be around 20... that is already much too young for me, but perhaps not to play their grandmothers in a movie...
A friend's wife:
Great grandson 2015
Feeling old again. :-(