Our thirties were trying, to say the least - get a home, get a job, have kids - and that's without thinking about any future middle-age crises. At 40, we're free from parental pressure, our professional lives are in check and we're no longer being kept up by crying babies. You hate your job? No problem, you'll find another one! Your husband tells you he's leaving? Hit the town for a girls' night out. Want another baby while there's still time? And with it enjoy a second childhood?