"My sister?"
"I think it must have been your sister. She said it was her sister
I was to go and see."
"I didn't know she was coming. She never told me."
"Pity. I was coming out to see you first thing tomorrow morning."
"Then you know? She told you?"
"She told me something." He smiled. "She must have been a little overanxious. You don't look as if there was very much the matter with you."
"But there isn't. It isn't me."
"Who is it then?"
"My other sister."
"Oh. I seem to have got a little mixed."