Food poisoning: would you let your friend know if you think you got it from eating at their house?

I was at a friend’s house yesterday with my kids and last night and this morning my daughter and I have a wicked case of food poisoning. I am 90% sure we got it from her house as her daughter was suffering from some symptoms and because my son was there and didn’t eat anything and is fine.

She doesn’t have the cleanest kitchen but I am on the fence as to whether I want to let her know as I don’t want to hurt her feelings. Besides many people don’t equate nausea and vomiting with food poisoning and, really, we’ll be better probably by tonight.

What would you do?