You've had every right to look out for them and report the mother.
This consitutes as ground for removal of the boys. I hope their situation will improve. I doubt the mother will change.
Yep, I'd dob the parents in.
I believe that they would charged their mother. I feel bad for the kids who
rotten, terribly cold, and shivering.
So, I feel terrible. 
I think you should report to the school and DSS. I bet.
That make me sick because their parents won't come back!

You did the right thing. I'm sorry you had to go through this.
Kalista ... dont forget us, we are here for you!..