I dont really think it is a huge deal what age you are when you become a dad or mum, as long as you'll be there to take care of, support, love etc the kids. My DH is 34 now and will still be 34 when bub is born next year. I dont think thats very old.
A man who used to work where I work, retired last year . Dont know his age but I am guessing he would be around 60 or so judging by what he looks like. He and his partner have 1 year old twin girls. I always thought that it would be terrible for your teenage/early 20's children to have to care for you when youre alll old and stuff. Maybe its not so bad though?