Personally I have some doubts about what is in that article. However, if what is in People is correct, it also doesn't make sense for her to have left the house at any time after 10pm either, such as with the theory that she disposed of Lisa's body unbeknownst to him. I could see her staying up for a while waiting for his arrival, then finally going to bed........however, the later she retires to the bedroom and goes to sleep the more narrow the timeline is for an abductor. We do know now, however, that someone had possession of those cell phones at 2:30am and a call was made to MW. The question is: who?
MOO