I have been going to Chiros since my early 20's and am now in my 50's. I have learned over this period that If the chiropractor tells you to come back only when you NEED to, he/she is probably a good one...the others with multiple extended treatment plans are just money grabbers.
I had a similar experience...ONCE!
1. No...you are not over reacting
2. Yes, clean up the pee (unless you don't care if your house stinks), and
3. People (that includes family) are only going to do to you what you LET them do to you. You have given them plenty of opportunity to step up to...