Why do I find it so hard to "crack down" on parents?

[mimi]

I gage each parent seperately as to how I approach them. Most are very agreeable and understanding however I have a mom who is very nice but very defensive. No matter how you phrase something she hears a critisium (sp) and gives a defensive answer. I tread carefully with her and gently stand my ground with my policys. I have only had to terminate one family and it was after putting up with alot of policy infractions that I finally said enough. I still felt bad doing it as I loved the child.