Over My Dead Body by Rex Stout

Page 33:

"I'm resigning as of this moment."
"Resigning from what?"
"You. My job."
"Rubbish."
"No, boss, really. You told the G-man you have never married. Yet you have a daughter. Well — " I shrugged. "I'm not a prude, but there are limits —"

– A scandalized Archie ragging Wolfe