Your take on my tortilla chip "throw down"?

My 5 year old little girl woke up sick 2 nights ago vomiting everywhere saying the hot dogs she ate for dinner upset her stomach...my husband, the next morning woke up doing the same, so I, like anyone else with common sense would assume, they had food poisoning. So, I kept her home from school , therefore missing her last day of kindergarten. Using the BRAT diet (bananas, rice, applesauce, toast) all foods she would never eat if she weren't sick, she refused them and what she did eat would come back up, so I gave her unsalted plain tortilla chips and gatorade...and and I froze pedialyte to make it like popsicles so she'd eat on them all day. So, now my over dramatic mother in law is now threatening to "call CPS" for not feeding my child and keeping her home from school. I'm not worried about any of this but I want someone else's opinion on this...