31 - she's 37 now! And that was pretty old then.
When I had my first at 28, I was down in my notes as an 'elderly' primigravida. The other mums on the ward were max early 20s, and one of them, only 19 IIRC, said, 'I hope I look like you when I'm 28!'
Made me feel more like 58!
A dd's friend recently had no. 2 at 42, and another had no. 2 a year or so ago at 45. Dd just managed to squeeze no. 2 in before she hit 40.