Dell Inspiron 1525, Sleep Mode and Magentic Bracelets
File this in the Hmmm category. Apparently Dell uses a magnet for detecting if the lid has been closed. If you (or your wife) is wearing a magnetic bracelet and it gets close to the sensor, your computer will go to sleep. Leading your wife to yell in frustration. I do need to give her credit, she did figure out it was the bracelet.