He decided to write her a letter saying he was tired of her and didn’t want to live with her anymore. He knew it was petty and perhaps childish, but he needed to know how his wife felt about him. And besides, this was more of a prank than a real test, right?
After writing the letter, he put it on the table in the bedroom and then climbed under the bed to hide until his wife got home. He hoped to hear her outraged response, or to see her get upset.