More kids??

Brenna
I have a question, so I was a single mother of 4 children my oldest 19 and going in the marines. So I had 3 at home, I met the love of my life my soul mate a year ago and now we have an 8 week old. Dad is 45 and I'm 36, so now we have 4 kids.. He's amazing to my other kids and claims them as his own and has stepped up to the plate! We are getting married may 20 2017, we have talked about having another after we get married.. Are we crazy?  Our age is also a concern..