I saw it a llittle bit differently. She began with a very sexy robe and there was a good amount of affection - even from Paul. They lay on the couch together - cuddles - for a long time - Paul began more affection and whamo - it all stops! Maybe someone saw exactly WHAT did happen!
Also,,,any ideas why Paul bathed out of a bucket in the tub instead of using the normal running water? They filled the pail with water and Paul then gets in the tub and bathes from that water.