Bigger age gap between dc2 and 3

[MarmaladeToastAndAMarmaladeCat]

Not a big age gap by any stretch of the imagination but I’m expecting dc3 and there will be a 3.5 year age gap between him/her and dc2. There is just an 18 month gap between my first two and they are very close, can fight like cat and dog but play very well together most of the time, are best friends and completely inseparable from one another.

I was wondering if anyone had a bigger gap between their third or subsequent children and how it worked out, if they all get on, play well together, little one isn’t left out?