Multiple coincidences in one family.

My younger sister was born on my mother's birthday. My daughter was born on my father's birthday. My daughter's first child was born on my son's birthday and a few years later my daughter's friend's child was born on that same date. I was married on my niece's birthday and years later my mother died on that date. More recently, I sat in an Italian conversation class and said at some point, "I was born and brought up in Southport". Whereupon my neighbour in the class said that she was too and we discovered that we had grown up in houses about 15 minutes apart and had both been to the same secondary school, although she was a few years behind me. We then entertained the class by remembering, and singing, the silly song about a squirrel we used to have to sing in the Spanish class.