To begin with, Ben and I aren't planning on having kids any time soon, so don't get your hopes up based on the title.
The deep thought is...why have kids? Are they really worth it? People always say "oh, it's different when it's your own." But is it different enough? I was reading "Saint Maybe" who pointed out that raising kids actually included spending a lot of boring time with them.
I'm doing a poor job explaining myself, but I'd encourage you to share your thoughts. Does the love and joy really make up for all the extra work, frustrations, and money? Really really make up for it? What's the best part? What's the worst part? Would you do it again? (You can secretly message me if you don't want to world to know that you actually wouldn't do it again...and yes, I know you love your kids. This would be like an alternate universe.) Would getting another cat really be a better option?