I'm the oldest so far: one month shy of my 44th birthday.
We kept saying next year until I heard the clock really ticking, and then couldn't get pregnant. Three years and several infertility doctors later, we had DS. Of course, everyone thought we weren't having kids, and that he was an oops!
We did it backwards, we traveled, started a business, paid off our house, and now I am a SAHM.