My, that herring is looking quite red to me.
Considering every attempt she'd made at clearing up the misunderstanding has been interpreted as 'you're trying to cover for yourself by lying', his train of thought should go immediately to "She didn't want him to know I already got one. What a thoughtful wife I have!"
I thought he would just hire his informants to figure out who Doug is. They did find out how stalker she was being, although not the right person lol.
I guess the story wouldn't be as interesting this way though.