Many sympathies. It's early in the day, but a large slug of brandy will work wonders. If ever you see little bottles of Underberg Bitters while you are out shopping, buy a couple for standby. Expensive, ferociously alcoholic (86 proof), but an absolute balm to a churning stomach.
As a matter of interest, what did she eat, was it sit-in, takeaway, home delivery, a restaurant she uses (or once used!) regularly?
I am interested because I eat home-delivered curry at least 3 nights a week, from several different curry houses, and touchwood, I have never had a problem.