I used a tripod, and shot about 4 or 5 different pictures with us moved around. Then I layered the shots in PS and erased the different parts of some layers to have to different people show through. I used a tool called "fluidmask" to mask out the individual people on the different layers.
Yes. They are all relatives of my wife, and the shot was in Hong Kong :) My wife is sitting in the easy chair, and with her head turned away on the couch and back by the window in the kitchen.... :)