Hi Mama, I wish you the best fortune....I was 40 when I had my only child with my husband (who is 8 1/3 years younger)....completely natural and unplanned to be honest. I am now 49 and wish I had tried for another, and even though I'm experiencing pre-menopausal symptoms, if I got pregnant now I would be delighted! And there is the chance as we flirt with the idea from time to time and take a shot (and don't use birth control). It would be much harder on my body at this age, but I would not think twice about it- don't let anyone discourage you if that's what YOU want! Make sure this is what you want as well, because it falls so much more on the mother in the first years, and it's exhausting and beautiful and totally worth any energy you have to expend as long as you are in good health!
And by the way, I married my husband at 40, and it's the best relationship of my life (still) -if your guy really truly loves you the age thing isn't central and be strong...don't listen to those who are not open-minded or enlightened enough to understand.
XX Peace!