First time posting . DS 15y friend is contacting DS’s, girlfriend stating DS is not as nice as people think, will physically hurt her and that he is a liar. This is his only friend and it has also transpired same “friend” when they were not friends set him up to be attacked by a number of kids. DS now knows this as friend laughed and told him this . DS wants me to call friend’s mum and sort things out , he wants me to fix the relationship. I want to call the mum yet am sure her DS will deny all so won’t achieve anything . What would you do ?