This is EXACTLY what I do....I rarely use measuring spoons or cups. Its just been in the past year or so that I've started scribbling notes while I cook, so that if something turns out amazing...I can at least look back at approximately what I just did, and start developing a recipe from there. Honestly...the only reason I started writing things down, was because I was constantly having people ask for recipes and didn't have anything to give them, except for an ingredients list.
Once I started writing things down....I kind of liked having the notes, because it allows me to tweak things on way or the other for better flavors, etc.
**make sure to tell her to not freak out when she opens the oven, and smoke rolls out...