Missy does sleep walk. She has for a long time. I used to do it when I was younger, but don't really do it anymore. (after you have kids, your sleep patterns change drastically) Most of the time, she'll come downstairs at 11:00/11:30 at night "to spend time with us". Usually, we just walk her back upstairs and put her right back to bed and she's fast asleep. I'm always worried she's going to fall down the stairs when she does this. We have a very high staircase and no break in the middle. The new problem is that yesterday morning, husband came downstairs and ALL the lights were on, the basement door was wide open and the lights were on in the basement. We ALWAYS check all this before going to bed. We definitely did not leave all those lights on. She must have gotten up in the middle of the night and went all the way down to the basement. She went back to bed, because husband went back up to check and they were both in bed sleeping. Missy does not remember getting up in the middle of the night. What should we do? She can get through a gate when she's sleeping, as she used to do that. I'm afraid if we put an alarm on her door, it would scare her awake and cause more of problem. I've heard weird things that happen when you wake someone who's sleepwalking.