Just curious about other mom's

So I am 33 and I have a 4 and half year old son, and now a 11 day old son. My husband and I want, at least 1 more. But, it takes us a while to get pregnant, and I don't know how old I want to be and still trying for more kids... So if you don't mind, how old are you? How many kids do you have? Do you think the older you are the harder it is? What age will you stop trying to have kids??