I have a churchmate who got married at 40 and had two sons by the time he turned 45. I guess it's a personal decision and if the person really wants to have more kids. If you're financially able to support more kids, and if your hubs is 100% okay, then go for it.
There's a certain kind of happiness that comes with having many kids (I myself have 3 siblings and it's fun. I really love them.) You know you'll have someone to take care of you (and for them to take care of each other) in the future as well.