I want another baby.

I have a 13 month old and I'm ready for another baby. I loved being pregnant despite how sick I was, I absolutely loved it! I'm more than happy with my little boy, i would just like to have another. When I mention something to my husband about it he makes jokes about not having any more. He says that if we tried again we won't have as cute of a kid because we used all of our cute for our son. I know he wants more but he makes it seem like it won't be for a REALLY long time. Any advise? Here's a picture of my little just for fun.