We'll I'm 28 and I have a 5 year old sister. My mom married my step dad and at 42 she had my baby sister. We crack jokes sometimes because I'm trying to have a baby now and our kids will grow up together
My faith teaches me that those who wait on the Lord shall renew their strength. It is not too late to persiut your dreams and goals. Better late than never. Bless you.
40 is pushing it...but whatever you feel is right. The older you get the more risky and dangerous it gets.