They may be a married couple, but it's better to think of them as live-in boyfriend and girlfriend with a legally-recognized relationship. And, no, pretty sure every time they reference the passage of time, they make it clear it hasn't been very long since they've been married. Don't keep saying it's been over a month when it took 18 chapters for a whole week to go by, according to dialog, as of chapter 20. We're not even to chapter 74, when I feel like you could legitimately say it's been four weeks based on that implied progression of time.