I'm one of the oldies here
My oldest son was born when I was 35. Carolina came home when I was 39, and then Clair-Elise was born 7 months later. Jesse just came home a week before I turned 41, and Maria is due in four months - I'll still be 41. And DH turns 48 next week.
DH and I don't think about retirement - just don't think we'll ever get there! But we're having fun!