"Oh, I forgot that you can't see to read. But perhaps you might care to smoke."
"Are you going away?"
"I--don't mind your smoking."
He lighted a cigarette; she looked at him irresolutely.
"You mustn't think of remaining," he said. Whereupon she seated herself.
"I suppose I ought to try to amuse you--till Ferdinand returns with a plumber," she said.
He protested: "I couldn't think of asking so much from you."
"Anyway, it's my duty," she insisted. "I ought."
"Why?"
"Because you are under my roof--a guest."