Anyone have a big age gap between children

[sineady]

My son will be 6 when his baby brother arrives

 

[Mthoodmom]

I'm having my third in March. My other two children are 15 and 13. I'm anticipating that the older children will be more like uncles than siblings. It will be an interesting experience to have this little one after having two that were only 18 months apart. I'm thinking it will be a bit like having an only child?