You know if I were you I would let that lady plead and beg for a million years and I would in no way sell her a puppy. I just do not feel that yorkies are like other dogs and really babies and so fragile. I would be extremely of anyone with small children unless I knew them very well and had excellent references and even visited their home to see how the children did around animals. I believe if you start when children are young teaching them about animals they will learn the right way to be around them but if you don't feel in your heart that this lady had taught her children then you are doing the right thing and not selling her any puppy at all. Stick to your guns! If the lady does not like it I would just tell her well too bad!!