Just when you think you have life worked out, you become a grandparent and things get complicated again.
Notwithstanding the exquisite joy that grandchildren deliver, there are quite a few challenges when adjusting to the role of Grand Parent.
A whole new group of people enter your life, in the form of in-laws (and often their friends and extended families). Prior to the arrival of the tiny treasure that is your grandchild, you may not have had to deal with this other group much.
However, once the child is born there will be occasions (such as birthday parties) you will need to interact and your diplomatic skills have never been so important.