Mean Mommy! Parenting at a C+?

I dropped my daughter off at school on Monday, to have a fellow student's mother push her way between my children, to make her way to the door that lead upstairs to our children's classroom for daycare. This mother is not the nicest lady to walk the face of the earth. Always giving the staff and other parents problems, such as 'Your child is not nice to mine'. Or, having fights with her soon to be ex in the school parking lot. I look at my sons face, confused with what just happened and shocked to see his sister who's hand he was holding, was no longer holding her hand. In my bear protecting her cub ways, I got down to my children's level and said, "you see children her mommy and daddy did not teach her any manners." She stops in her tracks, turns around and looked at me. With a pause, she snarled, "You have a problem? You're being rude?" While yanking her son in every move she made. Keeping cool, I look back at her without losing eye contact, "I'm not being rude. You're just insignificant. You pushed my children out of your way. Did you not see them? What do you have to say to that?" "I don't have time to wait for your kids to move their asses out of my way!" "Yeah, because we are here to make your life hard! Say sorry to my children so you can show your son how not to act with others around." Moving closer and closer to each other, not a word said for a few seconds. I come out and say, "I don't know what your problem is, but I'll bet it's hard to pronounce. Just say sorry to my children for pushing them out of the way and show your son how to respect others. Okay?" Huffing and puffing, "Sorry." Aarons reply, "That's okay, I'm pretending there is duck tape over your mouth." I nudged him, in his shoulder so he would say sorry for his comment, "Sorry, have good day!" with a big smile. Secretly content that my brother's sarcasm has been learned! We waited for her to come back down after dropping her son off upstairs and then we made our way up stairs to deliver Shelby to her class. On my way out, one of Shelby's teachers said "Thank you for giving your two-cents to the fellow mother." Outcome, have yet to have another encounter with the monster!