While I agree with not charging her for what you did I must make a comment.
Why on earth did you not charge her for the job you left behind??
Spray, extract, lift carpet, spray, extract, lift underlay, spray, load van, dump carpet, maybe pull skirting, dry floor, maybe seal the floor, dry walls, replace skirting, replace underlay, replace carpet......
You walked away from a job worth many hundreds possibly a few thousand.
What you did I feel was quite right, what you didnt do was criminal. Best, Dave.