Dear DSO: “Why does my wife try to sabotage my efforts… but she enjoys the rewards?”

We've heard this story a few times! A man goes through a ton of huge personal changes and everything about his marriage improves (including the sex). Wife seems happier. BUT... if you ask her, her happiness has nothing to do with his changes. In fact, she seems hellbent on sabotaging his efforts and making him feel guilty. WHY??