Actually, correct me if I misread it, but I think the wording from the article was that Prince worked 156 hours straight in the prior days which doesn't necessarily mean he wasn't napping or sleeping where he worked. He was known to stay in his studio with his music for days on end. This probably means he slept there and didn't make an offical trip to the bedroom, hence the working straight through verbage. Kind of like doctors catching cat naps here and there on their 24-48 hour shifts. I really think the media is misconstruing what the brother in law meant by that.
Based on some of the other reports (and I can attest to this with a recent back injury) it sounds like Prince was in a lot of pain from hip injuries and that can make it impossible to sleep so you may as well get up and do something to take your mind off of it. I can not tell you how frustrating and exhausting that is. I dealt with that for about two months recently and it still lingers. It's not fun.
It will be so sad if this comes back as a simple medication error which is so easy to do when you're not feeling well, in pain, exhausted, and just flat out over being unwell.
