Diane-
First of all, how very thoughtful of you, my suggestions might be repeats, but please forgive me.
A couple of categories-
FOOD-
for her, for her kids, for her spouse, for her dad, for her mom.
Say some packed lunches or a gift certificate for coffee she can use during her trip.For her kids, maybe you can do some individually wrapped brownies, cinnamon buns, etc to throw in a lunch, some monkey bread for a special dessert. For her spouse how about a sunday roast, or a ham (you know the kind of thing that takes forever to cook and no one can bother to do when they are overextended). The spouse might also appreciate some cookie mixes, some grown up sides like creamed spinach, or brussel sprouts. For her dad, maybe some salami and cheese and crackers, maybe a fruit basket. Its hard to remember to eat well when your SO is doing poorly. Mom might be able to eat something off menu when she is very ill. see what that might be.
get a maid-
groupon a housekeeping service and get a couple of three hour cleaning sessions for her home and a few for her dad's home.
get laundry service-
have the local laundromat come by with pick up and delivery.
restock her paper goods buy paper towels, napkins, plates, cuttlery, cups, tp, swiffer stuff, clorox wipes, etc.
restock her non perishables - pasta, sauce, boullion, beans, rice, canned goods.
take the kids to the movies, take the kids to the zoo, send her husband and her out bowling, take the kids to a nature walk, take the kids on a bike ride and get some ice cream. camp indoors.
You can even share your list of suggestions and ask her to choose which if any feel right for her.
Good luck to you and yours,
F. B.