You figured out what was missing, as you continue writing about Nat in the TF-Note. Natalie was still fat, so you decide to help her lose weight the magical way, instead of having her go through all those workout routines. With the TF-Note, you decrease a couple of pounds off of Nat, by writing this sentence.
"Natalie was at 400 lbs, but decreased at 300 lbs, while her breasts still remained the same size." You look back at Nat, and found that just like what you wrote, she has shed some weight from the magic in her body, until she had the body of a regular skinny girl with big breasts, and a butt. First clear eyesight, and now the body of a sexy dame. You decide to change one more thing, before you start, you had to check if the hall monitor wasn't there that day, so you continue one last change.