My mother-in-law acts like a child: Advice?

Does anyone else have an issue with her mother in law acting like a child? It was my daughters 6th birthday yesterday and my mother in law constantly wanted to have a camera in her face and try to be hugging her and kissing on her and my daughter was getting mad and over stimulated so I said something and my daughter ended up running off and my mother in law legit got mad at a 6 year old and left…i feel like this isnt normal behavior for a grown woman