I know someone who is an extreme example of this. My wife will go to bed at 11 on a Friday night, wake up around 8, go out to the living room, then fall right b

I know someone who is an extreme example of this. My wife will go to bed at 11 on a Friday night, wake up around 8, go out to the living room, then fall right back to sleep. I thought it might be that I was snoring but she claims she is sleeping through the whole night. On top of that, she's not a particularly long sleeper in the week (7.5 or so hours). I don't get it to be honest. In any case, just want to reaffirm that the test proposed in the top comment is way off target.