Everything Comes in Twos

So far Deanna and Paul have gotten their grandchildren in twos. Hayden came first and a month later Addison was born. Two years later, Avery was born and a little less then a month later Landon was born. Deanna and Dianna are twins and so are Keith and Kevin. Mimi got pregnant with twins her second pregnancy and so did Deanna. This doesn't go along with Kevin's side but on my Dad's side of the family there are six sets of twins. Does anyone understand why I'm a little afraid to have another kid? I guess we will have to wait and see if Deanna and Paul will end up with anymore grad kids and if they will come in twos.