The game didnt have a chance to save before you closed it. The games Auto-saves every ten minutes. You can find a thread about this (see edit) I hope it helps..
*Edit* I removed the link because it lead you to the wrong place.. So sorry if it caused any confusion!

*Edit* Sorry Xay, I seem to be stepping on your toes today. I again didnt see your post. Sorry!
Good Luck with your families