A wife desperately tries to prove to her husband that her affair is over. He had already forgiven her, but still hadn’t spoken to her in days. The only thing she could think of, is that he must still not trust her.
To convince him, she cut her ex lover’s obituary out of the newspaper. Her affair ended long before the accident, but she thought she could ease her husband’s mind once and for all.
“You see,” she told him, “he was struck by a drunk driver.”
“I wasn’t drunk.” He replied.
Explanation: The humor comes from the sudden and dark revelation in the punchline. The wife tries to convince her husband that her former lover’s death proves her faithfulness, but his response—implying he was the one who killed the man—turns the situation on its head with a shockingly ironic twist.