At breakfast after the Night of the Burning Barn (when Van and Ada make love for the first time) Van Veen (the narrator and main character in VN’s novel Ada, 1969) says that Uncle Dan is all wet:
Meanwhile, Uncle Dan, in delayed action, chased an imaginary insect off his pate, looked up, looked around, and at last acknowledged the newcomer.
‘Oh yes, Ada,’ he said, ‘Van here is anxious to know something. What were you doing, my dear, while he and I were taking care of the fire?’