I made it to the end of this post. That's a lot of drama and, unfortunately, in my 4 years of being open I have seen quite a bit similar to this (at least 4 families off the top of my head).

So sorry that it escalated with the Mom so quickly. I've found that even if you find a way to terminate a contract in the nicest, simplest way possible an offended parent will still find some way to stick it to you. I had this happen two weeks ago and it was terrible. Like you, it was my second termination in two months. I'm advertising to fill the spot currently, but will be taking a full month off to unwind (2 weeks in, 2 or more to go). Perhaps you can do the same.

MANY hugs for your stress.