We went and picked the kids up last night, got home around 8. We put them to bed, finished our dinners (I made spaghetti for dinner, but oddly enough, when you start cooking 5 minutes before you're supposed to leave, there's not a lot of time left to eat), I checked email, and then, shortly before 9, I sat down in front of the tv where my dad was watching PBS.
Around 15 minutes later, I was fast asleep, and stayed asleep until my dad shook me awake at 11 pm and told me to go to bed. And, amazingly, I got up, checked my email, then went right back to sleep (this time in my bed), no muss, no fuss.
I don't think I've fallen asleep before midnight, no matter how tired I was, for weeks. Months maybe. First night my babies are back, safe and sound, and I pass out almost instantly.