At 0311 on the 21st of December 2016 Kate woke me up by going to the loo. Pregnant women visiting the toilet 4 times a night isn't remarkable, so I stirred but stayed curled up under in thick PJs and three times the covers that ordinary people do. The side effect of human baking is that you generate your own heat like a geothermal vent and the heating has been pretty much off for months. Pregnant women fitted with a heat exchange unit is a viable renewable energy source.
Kate sounded urgent when she returned.
"That's my waters breaking."