It's late in the evening

8 o'clock in the evening, wife at work, eldest son away with pals, and my youngest at Karate training, it's at this point you realise that when they were growing up you longed for some time to yourself, and when you get it, you realise what a great time it was when they were wee, and you wished that you took more time to really appreciate it.
It's not a feeling of regret or real sadness, it's just a little stab occasionally to remind you that you were the luckiest man in the world.