Go buy her a new crockpot
then take the old one out to the garage and use it for cleaning engines. my crockpot still looks pretty new so I took a black magic marker and wrote "POISON not for food stuffs" on the side.
Once you use antifreeze in it it permeates (sp?) the pot and will leave traces in everything you put in after so dont cook with it after you have cleaned a engine with it .
John