What if you went to the house when you knew the daughter is at school maybe they would answer the door, its a dilemma isnt it, but I do agree that it sounds like she needs some hlpe, does your son know why she is doing this what reason does she say to him ?
The girl is also 15. I also wonder if the mom is aware, but I know that if someone said that wanted to talk to me about my son and that it was important, I would stop what I was doing and have that conversation right then. I guess not all parents think alike. I suppose that for me to have any piece of mind about this I will contact child protective services. If the mother knows and is doing nothing about it they probably need to be notified anyway. I just really don't want anything to happen to this young girl. Thanks for your reply
If you cannot get her to return your calls it means that she must be aware of what her daughter is doing, does your son go to their house ? maybe he could ask the Mom to contact you ,how old is she ? I do agree that if she has tried suicide that she does need help ,if you cannot speak to her parents you may have to contact child protection agencies for help for her. Good Luck