The only explanation I can think of is that the rapture happened and Janet was the only one taken.
(Some Christians believe that before the world ends, or Jesus returns, or the thousand-year war, I'm not sure precisely, that Christians will be sort of whisked away to heaven in a cloud. This is what's meant by the Rapture. So if Janet's the only to go church is in a sorry state. Although we wouldn't expect Chris to get there, would we?)