Given 51, no debt, paid-off house, $80K cash, lower risk tolerance (given age), I would usually suggest a balanced portfolio, not an all-equity one.
A sensible starting range:
40 equity/60 debt if she is very cautious
60/40 if she can handle moderate swings
VBAL / XBAL / ZBAL for roughly 60/40
VCNS / XCNS / ZCON for more conservative