Mutually assured destruction.

“I grab a chair. "I don't mean to pry," I say, "but we're in a hospital. You sur…”

“Startled, he loosed his grasp and she pulled free. He clutched her arm, but she…”

“If we have to be cat burglars, I'm going to see what' to steal in the fridge."W…”

“Lie until even you believe it - that's the real secret of lying”