Thanks for all the comments. I know it wasnt just a birthday party as she has them EVERYDAY. She is a bit older and her children are teens. Thursdays seem to be her "excess" days where she sometimes has even more than 13, but she still has too many small ones for what I was told by child services for our province.
Myself and a friend who also runs a day home both kind of decided that the kids seem happy, the parents dont seem to care and it is her sanity not ours so... whatever! I dont know if her kids help out after school or what goes on in the home, but I have never seen anyone else come or go from that house who is an adult. I have watched her leave the small kids in the front room watching her and she has run across the street to get kids from kindergarten on cold or rainy days... the kids all stay in the window and she turns and looks at them about every 30 seconds... I thought "WOW LADY" but... again I cant say for sure that there isnt someone else that is an adult in the home. I have never ever seen one, she takes the kids out on her own, etc.
I dont think I will report her unless the kids seem to become unhappy. I have seen parents pick their kids up and they dont seem to care that there are 13 kids there so... thats their choice I guess!