Having three kids can be easier then having two for several different reason. You are more confident as a parent because you have already done this twice before, you know the ins and outs of parenting and pretty much what to expect through the stages. You also start to realize that you are not a perfect parent so you start to let things go easy, you learn to pick your battles.

Key Takeaways:

• When it comes to kids, more does not necessarily mean more work.
• Transitioning from two kids to three can — sometimes, at least — be easier than going from one to two.
• By the time you have your third child you’ve already taken your prereq classes and can finally move on to putting into practice what you’ve already learned.

“Ask multiple parents about ideal family size, and you’re likely to get multiple answers. But one trope that keeps coming up over and over is that having three kids is harder than having two because that’s the point at which the kids outnumber the parents”

http://www.sheknows.com/parenting/articles/1132435/three-kids-easier-than-two