Before I set up my own business a few years ago I was working all day and my wife worked most evenings. It's not much fun getting home at 7pm on a cold dark night to be met by your wife waiting for you on the doorstep because she's late for work, who hands you a small child who she informs you has just filled his nappy, and your tea is beans on toast and it's still in the cupboard! This is no word of exaggeration.
Thank god those days are gone.