DH and I are trying to decide if we want to add to our family or if we will be one and done. DS is just about 3.25 yo and he is just awesome. Yes, he is a preschooler with big emotions and pushes boundaries, but he is seriously a pretty easy kid and so cute and funny and clever. DH and I both work outside the house full time and we live in extremely high COL area. We always thought we would have 2 kids, but when I got my IUD removed in January, I began to have second thoughts. Both DH and I could go either way and I feel like that is making the decision harder! I can imagine our life with just DS or with another child and they both seem lovely, just in different ways. If we do have another one, we would be looking at a 4.25 year age gap at least. Also for reference, I am 33 and DH is 34

So! Two questions!
How did you know your family was complete?
Any experience with a 4+ year age gap? Pros? Cons?