when your partner doesn't want anymore kids?

I've always dreamed of having three children but hubby says he's done and happy with our two children, he's worried about the financial side of things, my youngest has only just started sleeping through at 2.5! And he's worried he won't cope going through that all again? So where do we go from here? Will I always resent him? Will he resent me if we did have another child and it put a strain on the family financially? ?