First Pregnancy in 40s

I'm 29 and have been dating a girl in her 40s (she looks younger than her age). We are getting more serious...and thinking of marriage. However, I am worried if I ever get married with her: 1) the chances of her getting pregnant, 2) the number of children we can get since I love kids. She acknowledged she's not getting any younger and she is not sure if she can give birth. There's lots of complications and she's a foreigner... Has anyone know someone who had their first pregnancy in their 40s?