hmmmmm, think Mr P gets nights out in the pink limo on a regualar basis for quilt stealing! The problem with sharing duvets is men are hot and women are cold (normally, and only in a sleeping sense), maybe you should try having one of those fans on a stand wirring above your body all night.
think Amanda p has a point here, think your duffle coat, tog 15 duvet, heating on full blast late night curry are not helping. though they do say that no matter how much u run/how fit u r people still sweat almost same as before??