I have 15 years between DS1 and DS2. We are currently TTC at the moment so, if we fall pregnant within the next couple of months, I will have a 20 year old, a 5 year old and a newborn..... age gaps don't matter. DS1 and DS2 are great together. Sure, they are at completely different stages of their lives (one in preschool and one at uni) but they adore each other and I know that DS1 will always be there for his little brother.